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navpatterns/1-patterns/queries/index.html
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<link rel=alternate type=application/rss+xml href=/navpatterns/1-patterns/queries/index.xml title="AL Guidelines">
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<title>Queries :: AL Guidelines</title>
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@ -33,9 +33,9 @@ ALGuidelines.Dev
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@ -58,7 +58,7 @@ ALGuidelines.Dev
<li data-nav-id=/navpatterns/1-patterns/creating-custom-charts/ title="Creating Custom Charts" class=dd-item><a href=/navpatterns/1-patterns/creating-custom-charts/>Creating Custom Charts</a></li>
<li data-nav-id=/navpatterns/1-patterns/cross-session-events/ title="Cross Session Events" class=dd-item><a href=/navpatterns/1-patterns/cross-session-events/>Cross Session Events</a></li>
<li data-nav-id=/navpatterns/1-patterns/currently-active-record/ title="Currently Active Record" class=dd-item><a href=/navpatterns/1-patterns/currently-active-record/>Currently Active Record</a></li>
<li data-nav-id=/navpatterns/1-patterns/data-migration-facade/ title="Data Migration Facade" class=dd-item><a href=/navpatterns/1-patterns/data-migration-facade/>Data Migration Facade</a></li>
<li data-nav-id=/navpatterns/1-patterns/data-migration-facade/ title="Data Migration Façade" class=dd-item><a href=/navpatterns/1-patterns/data-migration-facade/>Data Migration Façade</a></li>
<li data-nav-id=/navpatterns/1-patterns/discovery-event/ title="Discovery Event" class=dd-item><a href=/navpatterns/1-patterns/discovery-event/>Discovery Event</a></li>
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@ -86,12 +86,17 @@ ALGuidelines.Dev
<li data-nav-id=/navpatterns/1-patterns/product-name/ title="Product Name" class=dd-item><a href=/navpatterns/1-patterns/product-name/>Product Name</a></li>
<li data-nav-id=/navpatterns/1-patterns/queries/ title=Queries class="dd-item active parent"><a href=/navpatterns/1-patterns/queries/>Queries</a><ul>
<li data-nav-id=/navpatterns/1-patterns/queries/select-distinct-with-queries/ title="SELECT DISTINCT with Queries" class=dd-item><a href=/navpatterns/1-patterns/queries/select-distinct-with-queries/>SELECT DISTINCT with Queries</a></li>
<li data-nav-id=/navpatterns/1-patterns/queries/use-queries-to-detect-duplicate-records/ title="use Queries to Detect Duplicate Records" class=dd-item><a href=/navpatterns/1-patterns/queries/use-queries-to-detect-duplicate-records/>use Queries to Detect Duplicate Records</a></li>
<li data-nav-id=/navpatterns/1-patterns/queries/use-queries-to-detect-duplicate-records/ title="Use Queries to Detect Duplicate Records" class=dd-item><a href=/navpatterns/1-patterns/queries/use-queries-to-detect-duplicate-records/>Use Queries to Detect Duplicate Records</a></li>
<li data-nav-id=/navpatterns/1-patterns/queries/use-queries-to-replace-nested-loops/ title="Use Queries to Replace Nested Loops" class=dd-item><a href=/navpatterns/1-patterns/queries/use-queries-to-replace-nested-loops/>Use Queries to Replace Nested Loops</a></li></ul></li>
<li data-nav-id=/navpatterns/1-patterns/read-once-initialization-and-validation/ title="Read-once Initialization and Validation" class=dd-item><a href=/navpatterns/1-patterns/read-once-initialization-and-validation/>Read-once Initialization and Validation</a></li>
<li data-nav-id=/navpatterns/1-patterns/released-entity/ title="Released Entity" class=dd-item><a href=/navpatterns/1-patterns/released-entity/>Released Entity</a></li>
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<li data-nav-id=/navpatterns/1-patterns/security/ title=Security class=dd-item><a href=/navpatterns/1-patterns/security/>Security</a></li>
<li data-nav-id=/navpatterns/1-patterns/security/ title=Security class=dd-item><a href=/navpatterns/1-patterns/security/>Security</a><ul>
<li data-nav-id=/navpatterns/1-patterns/security/1-sensitive-data-encapsulation/ title="Sensitive Data Encapsulation" class=dd-item><a href=/navpatterns/1-patterns/security/1-sensitive-data-encapsulation/>Sensitive Data Encapsulation</a></li>
<li data-nav-id=/navpatterns/1-patterns/security/2-data-encryption/ title="Data Encryption" class=dd-item><a href=/navpatterns/1-patterns/security/2-data-encryption/>Data Encryption</a></li>
<li data-nav-id=/navpatterns/1-patterns/security/3-single-point-of-access/ title="Single Point of Access" class=dd-item><a href=/navpatterns/1-patterns/security/3-single-point-of-access/>Single Point of Access</a></li>
<li data-nav-id=/navpatterns/1-patterns/security/4-masked-text/ title="Masked Text" class=dd-item><a href=/navpatterns/1-patterns/security/4-masked-text/>Masked Text</a></li>
<li data-nav-id=/navpatterns/1-patterns/security/5-ssl-in-nav/ title="SSL in NAV" class=dd-item><a href=/navpatterns/1-patterns/security/5-ssl-in-nav/>SSL in NAV</a></li></ul></li>
<li data-nav-id=/navpatterns/1-patterns/setup-specificity-fallback/ title="Setup Specificity Fallback" class=dd-item><a href=/navpatterns/1-patterns/setup-specificity-fallback/>Setup Specificity Fallback</a></li>
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<li data-nav-id=/navpatterns/1-patterns/singleton/ title=Singleton class=dd-item><a href=/navpatterns/1-patterns/singleton/>Singleton</a><ul>
@ -108,8 +113,22 @@ ALGuidelines.Dev
<li data-nav-id=/navpatterns/2-anti-patterns/nav-upgrade/ title="Nav Upgrade" class=dd-item><a href=/navpatterns/2-anti-patterns/nav-upgrade/>Nav Upgrade</a></li>
<li data-nav-id=/navpatterns/2-anti-patterns/reusable-bugs/ title="Reusable Bugs" class=dd-item><a href=/navpatterns/2-anti-patterns/reusable-bugs/>Reusable Bugs</a></li></ul></li>
<li data-nav-id=/navpatterns/3-cal-coding-guidelines/ title="3. CAL Coding Guidelines" class=dd-item><a href=/navpatterns/3-cal-coding-guidelines/>3. CAL Coding Guidelines</a><ul>
<li data-nav-id=/navpatterns/3-cal-coding-guidelines/design/ title=Design class=dd-item><a href=/navpatterns/3-cal-coding-guidelines/design/>Design</a></li>
<li data-nav-id=/navpatterns/3-cal-coding-guidelines/internally-used-dot-net-types/ title="Internally-used DotNet Types" class=dd-item><a href=/navpatterns/3-cal-coding-guidelines/internally-used-dot-net-types/>Internally-used DotNet Types</a></li>
<li data-nav-id=/navpatterns/3-cal-coding-guidelines/design/ title=Design class=dd-item><a href=/navpatterns/3-cal-coding-guidelines/design/>Design</a><ul>
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<li data-nav-id=/navpatterns/3-cal-coding-guidelines/design/findset-findfirst-findlast/ title="FINDSET FINDFIRST FINDLAST" class=dd-item><a href=/navpatterns/3-cal-coding-guidelines/design/findset-findfirst-findlast/>FINDSET FINDFIRST FINDLAST</a></li>
<li data-nav-id=/navpatterns/3-cal-coding-guidelines/design/initialized-variables/ title="Initialized Variables" class=dd-item><a href=/navpatterns/3-cal-coding-guidelines/design/initialized-variables/>Initialized Variables</a></li>
<li data-nav-id=/navpatterns/3-cal-coding-guidelines/design/maintainability-index/ title="Maintainability Index" class=dd-item><a href=/navpatterns/3-cal-coding-guidelines/design/maintainability-index/>Maintainability Index</a></li>
<li data-nav-id=/navpatterns/3-cal-coding-guidelines/design/parameter-placeholders/ title="Parameter Placeholders" class=dd-item><a href=/navpatterns/3-cal-coding-guidelines/design/parameter-placeholders/>Parameter Placeholders</a></li>
<li data-nav-id=/navpatterns/3-cal-coding-guidelines/design/static-object-invocation/ title="Static Object Invocation" class=dd-item><a href=/navpatterns/3-cal-coding-guidelines/design/static-object-invocation/>Static Object Invocation</a></li>
<li data-nav-id=/navpatterns/3-cal-coding-guidelines/design/unreachable-code/ title="Unreachable Code" class=dd-item><a href=/navpatterns/3-cal-coding-guidelines/design/unreachable-code/>Unreachable Code</a></li>
<li data-nav-id=/navpatterns/3-cal-coding-guidelines/design/unused-initialized-variables/ title="Unused Initialized Variables" class=dd-item><a href=/navpatterns/3-cal-coding-guidelines/design/unused-initialized-variables/>Unused Initialized Variables</a></li>
<li data-nav-id=/navpatterns/3-cal-coding-guidelines/design/unused-variables/ title="Unused Variables" class=dd-item><a href=/navpatterns/3-cal-coding-guidelines/design/unused-variables/>Unused Variables</a></li>
<li data-nav-id=/navpatterns/3-cal-coding-guidelines/design/variable-capacity-mismatch/ title="Variable Capacity Mismatch" class=dd-item><a href=/navpatterns/3-cal-coding-guidelines/design/variable-capacity-mismatch/>Variable Capacity Mismatch</a></li>
<li data-nav-id=/navpatterns/3-cal-coding-guidelines/design/with-scope-name-collision/ title="WITH Scope Name Collision" class=dd-item><a href=/navpatterns/3-cal-coding-guidelines/design/with-scope-name-collision/>WITH Scope Name Collision</a></li></ul></li>
<li data-nav-id=/navpatterns/3-cal-coding-guidelines/internally-used-dot-net-types/ title="Internally used DotNet Types" class=dd-item><a href=/navpatterns/3-cal-coding-guidelines/internally-used-dot-net-types/>Internally used DotNet Types</a></li>
<li data-nav-id=/navpatterns/3-cal-coding-guidelines/internationalization/ title=Internationalization class=dd-item><a href=/navpatterns/3-cal-coding-guidelines/internationalization/>Internationalization</a><ul>
<li data-nav-id=/navpatterns/3-cal-coding-guidelines/internationalization/using-calcdate/ title="Using Calcdate" class=dd-item><a href=/navpatterns/3-cal-coding-guidelines/internationalization/using-calcdate/>Using Calcdate</a></li></ul></li>
<li data-nav-id=/navpatterns/3-cal-coding-guidelines/localizability/ title=Localizability class=dd-item><a href=/navpatterns/3-cal-coding-guidelines/localizability/>Localizability</a><ul>
@ -122,7 +141,7 @@ ALGuidelines.Dev
<li data-nav-id=/navpatterns/3-cal-coding-guidelines/readability/begin-as-an-afterword/ title="Begin as an 'After Word'" class=dd-item><a href=/navpatterns/3-cal-coding-guidelines/readability/begin-as-an-afterword/>Begin as an 'After Word'</a></li>
<li data-nav-id=/navpatterns/3-cal-coding-guidelines/readability/begin-end/ title="Begin-End - Compound Only" class=dd-item><a href=/navpatterns/3-cal-coding-guidelines/readability/begin-end/>Begin-End - Compound Only</a></li>
<li data-nav-id=/navpatterns/3-cal-coding-guidelines/readability/binary-operator-line-start/ title="Binary Operator to Start Line" class=dd-item><a href=/navpatterns/3-cal-coding-guidelines/readability/binary-operator-line-start/>Binary Operator to Start Line</a></li>
<li data-nav-id=/navpatterns/3-cal-coding-guidelines/readability/blank-lines/ title="Blank Lines.md" class=dd-item><a href=/navpatterns/3-cal-coding-guidelines/readability/blank-lines/>Blank Lines.md</a></li>
<li data-nav-id=/navpatterns/3-cal-coding-guidelines/readability/blank-lines/ title="Blank Lines" class=dd-item><a href=/navpatterns/3-cal-coding-guidelines/readability/blank-lines/>Blank Lines</a></li>
<li data-nav-id=/navpatterns/3-cal-coding-guidelines/readability/case-actions/ title="CASE Action" class=dd-item><a href=/navpatterns/3-cal-coding-guidelines/readability/case-actions/>CASE Action</a></li>
<li data-nav-id=/navpatterns/3-cal-coding-guidelines/readability/colon-usage-in-case/ title="Colon usage in CASE" class=dd-item><a href=/navpatterns/3-cal-coding-guidelines/readability/colon-usage-in-case/>Colon usage in CASE</a></li>
<li data-nav-id=/navpatterns/3-cal-coding-guidelines/readability/comments-curly-brackets/ title="Comments inside Curly Brackets" class=dd-item><a href=/navpatterns/3-cal-coding-guidelines/readability/comments-curly-brackets/>Comments inside Curly Brackets</a></li>
@ -229,12 +248,12 @@ ALGuidelines.Dev
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</body>
</html>

6
navpatterns/1-patterns/queries/index.xml
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@ -2,8 +2,8 @@
Abstract This pattern explains how to perform SELECT DISTINCT by using queries in Dynamics NAV.
Description
When working with tables, sometimes a developer needs to perform a SELECT DISTINCT (also known as SELECT UNIQUE) from a table. As NAV does not provide this out of the box, we present below a way to select unique records by using queries.
Problem statement</description></item><item><title>use Queries to Detect Duplicate Records</title><link>https://alguidelines.dev/navpatterns/1-patterns/queries/use-queries-to-detect-duplicate-records/</link><pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate><guid>https://alguidelines.dev/navpatterns/1-patterns/queries/use-queries-to-detect-duplicate-records/</guid><description>Originally by Abshishek Ghosh and Bogdan Sturzoiu at Microsoft Development Center Copenhagen**
**
Problem statement</description></item><item><title>Use Queries to Detect Duplicate Records</title><link>https://alguidelines.dev/navpatterns/1-patterns/queries/use-queries-to-detect-duplicate-records/</link><pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate><guid>https://alguidelines.dev/navpatterns/1-patterns/queries/use-queries-to-detect-duplicate-records/</guid><description>Originally by Abshishek Ghosh and Bogdan Sturzoiu at Microsoft Development Center Copenhagen
Abstract This pattern uses queries to create an efficient way to detect duplicate entries in a table. This is, for example, useful when trying to find out which customers or contacts have the same names, so we can merge them later.
Description Duplicate detection has several requirements in Microsoft Dynamics NAV. One method to eliminate duplication is by defining the relevant field as the primary key.</description></item><item><title>Use Queries to Replace Nested Loops</title><link>https://alguidelines.dev/navpatterns/1-patterns/queries/use-queries-to-replace-nested-loops/</link><pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate><guid>https://alguidelines.dev/navpatterns/1-patterns/queries/use-queries-to-replace-nested-loops/</guid><description>Originally by Bogdan Sturzoiu, Microsoft Development Center Copenhagen Abstract This pattern shows how the new query object type introduced in NAV 2013 allows you to replace costly loops when inspecting data from two or more tables.
Description Duplicate detection has several requirements in Microsoft Dynamics NAV. One method to eliminate duplication is by defining the relevant field as the primary key.</description></item><item><title>Use Queries to Replace Nested Loops</title><link>https://alguidelines.dev/navpatterns/1-patterns/queries/use-queries-to-replace-nested-loops/</link><pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate><guid>https://alguidelines.dev/navpatterns/1-patterns/queries/use-queries-to-replace-nested-loops/</guid><description>Originally by Bogdan Sturzoiu, Microsoft Development Center Copenhagen
Abstract This pattern shows how the new query object type introduced in NAV 2013 allows you to replace costly loops when inspecting data from two or more tables.
Description One of the core operations in a relational database is joining two or more tables. For example, you might need to extract all sales lines in the database together with information regarding the related sales header.</description></item></channel></rss>

79
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@ -32,9 +32,9 @@ ALGuidelines.Dev
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<ul class=topics>
@ -57,7 +57,7 @@ ALGuidelines.Dev
<li data-nav-id=/navpatterns/1-patterns/creating-custom-charts/ title="Creating Custom Charts" class=dd-item><a href=/navpatterns/1-patterns/creating-custom-charts/>Creating Custom Charts</a></li>
<li data-nav-id=/navpatterns/1-patterns/cross-session-events/ title="Cross Session Events" class=dd-item><a href=/navpatterns/1-patterns/cross-session-events/>Cross Session Events</a></li>
<li data-nav-id=/navpatterns/1-patterns/currently-active-record/ title="Currently Active Record" class=dd-item><a href=/navpatterns/1-patterns/currently-active-record/>Currently Active Record</a></li>
<li data-nav-id=/navpatterns/1-patterns/data-migration-facade/ title="Data Migration Facade" class=dd-item><a href=/navpatterns/1-patterns/data-migration-facade/>Data Migration Facade</a></li>
<li data-nav-id=/navpatterns/1-patterns/data-migration-facade/ title="Data Migration Façade" class=dd-item><a href=/navpatterns/1-patterns/data-migration-facade/>Data Migration Façade</a></li>
<li data-nav-id=/navpatterns/1-patterns/discovery-event/ title="Discovery Event" class=dd-item><a href=/navpatterns/1-patterns/discovery-event/>Discovery Event</a></li>
<li data-nav-id=/navpatterns/1-patterns/document/ title=Document class=dd-item><a href=/navpatterns/1-patterns/document/>Document</a></li>
<li data-nav-id=/navpatterns/1-patterns/easy-update-of-setup-or-supplementary-information/ title="Easy Update Of Setup Or Supplementary Information" class=dd-item><a href=/navpatterns/1-patterns/easy-update-of-setup-or-supplementary-information/>Easy Update Of Setup Or Supplementary Information</a></li>
@ -85,12 +85,17 @@ ALGuidelines.Dev
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@ -121,7 +140,7 @@ ALGuidelines.Dev
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@ -238,9 +257,9 @@ ALGuidelines.Dev
<p>Let&rsquo;s consider the <strong>VAT Entry</strong> table as below: <a href=https://microsoft.sharepoint.com/teams/DynamicsNAV/Wiki/Nav%20Wiki%20Documents/NAV%20App%20Patterns/NAV%20App%20Patterns%20for%20Review/Table%20Select%20Distinct.docx#_msocom_1><br>
</a></p>
<p><a href=6521.clip_5F00_image001.png><img src=6521.clip_5F00_image001.png alt=" "></a></p>
<p>The goal is to select one line for each separate document that produced VAT Entries. In other words, we want records grouped by <strong>Type, Document Type <strong>and</strong>Document No.</strong>. However, if there are multiple lines with the same value of the triad <strong>Type, Document Type <strong>and</strong>Document No.</strong> in the **VAT Entry **table, we only want to see one of them.</p>
<p>The goal is to select one line for each separate document that produced VAT Entries. In other words, we want records grouped by <strong>Type, Document Type</strong> and <strong>Document No.</strong>. However, if there are multiple lines with the same value of the triad <strong>Type, Document Type</strong> and <strong>Document No.</strong> in the <strong>VAT Entry</strong> table, we only want to see one of them.</p>
<h4 id=solution><strong>Solution</strong></h4>
<p>Create a new query object <strong>VAT Entry Distinct Document No.</strong>, with a single DataItem sourced from <strong>VAT Entry</strong> table. Add the three desired group-by fields **Type, Document Type <strong>and</strong>Document No. **as columns.</p>
<p>Create a new query object <strong>VAT Entry Distinct Document No.</strong>, with a single DataItem sourced from <strong>VAT Entry</strong> table. Add the three desired group-by fields <strong>Type, Document Type</strong> and <strong>Document No.</strong> as columns.</p>
<p><a href=clip_5F00_image002.png><img src=clip_5F00_image002.png alt=" "></a></p>
<p>To enable grouping, add one more column, with <strong>Method Type</strong> = <strong>Totals</strong>. This will automatically set the <strong>Group By</strong> checkbox to TRUE on the three precedent fields.</p>
<p>Note that the <strong>Group By</strong> field is read-only and trying to set it by hand will clarify that:</p>
@ -249,7 +268,7 @@ ALGuidelines.Dev
<p><a href=clip_5F00_image004.png><img src=clip_5F00_image004.png alt=" "></a></p>
<h3 id=example><strong>Example</strong></h3>
<p>One thing is to be noted: there is a limitation to how much information you can take out from the records. For example, if we need to extract more information than just the one we already have in the columns, then the following apply: adding one more column of <strong>Method Type</strong> = <strong>None</strong> will indeed show more information, but it <em>might</em> affect the grouping. More details below.</p>
<p>**The grouping is affected **for example****when the additional column is the <strong>VAT Entry No</strong>. In this case, this column brings up additional grouping criteria and one group for each entry number will end up being created.</p>
<p><strong>The grouping is affected</strong> for example when the additional column is the <strong>VAT Entry No</strong>. In this case, this column brings up additional grouping criteria and one group for each entry number will end up being created.</p>
<p><a href=clip_5F00_image005.png><img src=clip_5F00_image005.png alt=" "></a></p>
<p>You can notice that both lines of document 103001 are not visible, which contradicts the goal of SELECT DISTINCT.</p>
<p><a href=clip_5F00_image006.png><img src=clip_5F00_image006.png alt=" "></a></p>
@ -270,18 +289,18 @@ ALGuidelines.Dev
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<li itemscope itemtype=https://schema.org/ListItem itemprop=itemListElement><meta itemprop=position content="3"><a itemprop=item href=/navpatterns/1-patterns/><span itemprop=name>1. Patterns</span></a> > </li>
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@ -230,9 +249,8 @@ ALGuidelines.Dev
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<h1>use Queries to Detect Duplicate Records</h1>
<p><em>Originally by Abshishek Ghosh and Bogdan Sturzoiu at Microsoft Development Center Copenhagen**<br>
**</em></p>
<h1>Use Queries to Detect Duplicate Records</h1>
<p><em>Originally by Abshishek Ghosh and Bogdan Sturzoiu at Microsoft Development Center Copenhagen</em></p>
<h2 id=abstract><strong>Abstract</strong></h2>
<p>This pattern uses queries to create an efficient way to detect duplicate entries in a table. This is, for example, useful when trying to find out which customers or contacts have the same names, so we can merge them later.</p>
<h2 id=description><strong>Description</strong></h2>
@ -254,10 +272,10 @@ END;
</code></pre>
<h4 id=heading></h4>
<p>This code would involve setting filters on the <strong>Customer</strong> table as many times as there are records in the table. This is an expensive operation.</p>
<p>Starting with Dynamics NAV 2013, we can use queries to create a more efficient implementation of the same logic.****</p>
<p>Starting with Dynamics NAV 2013, we can use queries to create a more efficient implementation of the same logic.</p>
<h2 id=usage><strong>Usage</strong></h2>
<p>The solution involves that you create a query to return duplicates, and then invoke it from a method that would test the value of the query to identify if duplicates were found.</p>
<p>**Step 1 ****&ndash;**<strong>Creating the Query</strong></p>
<p><strong>Step 1</strong> &ndash; <strong>Creating the Query</strong></p>
<ul>
<li>The query must be created with the table we want to search in as the dataitem.</li>
<li>The field we want to search for must be created as a grouped field.</li>
@ -294,7 +312,7 @@ END;
<h4 id=heading-2></h4>
<p><strong>Examples</strong></p>
<ul>
<li>**Acc. Sched. Chart Management **codeunit (762),<br>
<li><strong>Acc. Sched. Chart Management</strong> codeunit (762),<br>
methods CheckDuplicateAccScheduleLineDescription and CheckDuplicateColumnLayoutColumnHeader</li>
<li><strong>Analysis Report Chart Mgt.</strong> codeunit (770),<br>
methods CheckDuplicateAnalysisLineDescription and CheckDuplicateAnalysisColumnHeader</li>
@ -313,12 +331,12 @@ methods CheckDuplicateAnalysisLineDescription and CheckDuplicateAnalysisColumnHe
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<li data-nav-id=/navpatterns/3-cal-coding-guidelines/design/maintainability-index/ title="Maintainability Index" class=dd-item><a href=/navpatterns/3-cal-coding-guidelines/design/maintainability-index/>Maintainability Index</a></li>
<li data-nav-id=/navpatterns/3-cal-coding-guidelines/design/parameter-placeholders/ title="Parameter Placeholders" class=dd-item><a href=/navpatterns/3-cal-coding-guidelines/design/parameter-placeholders/>Parameter Placeholders</a></li>
<li data-nav-id=/navpatterns/3-cal-coding-guidelines/design/static-object-invocation/ title="Static Object Invocation" class=dd-item><a href=/navpatterns/3-cal-coding-guidelines/design/static-object-invocation/>Static Object Invocation</a></li>
<li data-nav-id=/navpatterns/3-cal-coding-guidelines/design/unreachable-code/ title="Unreachable Code" class=dd-item><a href=/navpatterns/3-cal-coding-guidelines/design/unreachable-code/>Unreachable Code</a></li>
<li data-nav-id=/navpatterns/3-cal-coding-guidelines/design/unused-initialized-variables/ title="Unused Initialized Variables" class=dd-item><a href=/navpatterns/3-cal-coding-guidelines/design/unused-initialized-variables/>Unused Initialized Variables</a></li>
<li data-nav-id=/navpatterns/3-cal-coding-guidelines/design/unused-variables/ title="Unused Variables" class=dd-item><a href=/navpatterns/3-cal-coding-guidelines/design/unused-variables/>Unused Variables</a></li>
<li data-nav-id=/navpatterns/3-cal-coding-guidelines/design/variable-capacity-mismatch/ title="Variable Capacity Mismatch" class=dd-item><a href=/navpatterns/3-cal-coding-guidelines/design/variable-capacity-mismatch/>Variable Capacity Mismatch</a></li>
<li data-nav-id=/navpatterns/3-cal-coding-guidelines/design/with-scope-name-collision/ title="WITH Scope Name Collision" class=dd-item><a href=/navpatterns/3-cal-coding-guidelines/design/with-scope-name-collision/>WITH Scope Name Collision</a></li></ul></li>
<li data-nav-id=/navpatterns/3-cal-coding-guidelines/internally-used-dot-net-types/ title="Internally used DotNet Types" class=dd-item><a href=/navpatterns/3-cal-coding-guidelines/internally-used-dot-net-types/>Internally used DotNet Types</a></li>
<li data-nav-id=/navpatterns/3-cal-coding-guidelines/internationalization/ title=Internationalization class=dd-item><a href=/navpatterns/3-cal-coding-guidelines/internationalization/>Internationalization</a><ul>
<li data-nav-id=/navpatterns/3-cal-coding-guidelines/internationalization/using-calcdate/ title="Using Calcdate" class=dd-item><a href=/navpatterns/3-cal-coding-guidelines/internationalization/using-calcdate/>Using Calcdate</a></li></ul></li>
<li data-nav-id=/navpatterns/3-cal-coding-guidelines/localizability/ title=Localizability class=dd-item><a href=/navpatterns/3-cal-coding-guidelines/localizability/>Localizability</a><ul>
@ -121,7 +140,7 @@ ALGuidelines.Dev
<li data-nav-id=/navpatterns/3-cal-coding-guidelines/readability/begin-as-an-afterword/ title="Begin as an 'After Word'" class=dd-item><a href=/navpatterns/3-cal-coding-guidelines/readability/begin-as-an-afterword/>Begin as an 'After Word'</a></li>
<li data-nav-id=/navpatterns/3-cal-coding-guidelines/readability/begin-end/ title="Begin-End - Compound Only" class=dd-item><a href=/navpatterns/3-cal-coding-guidelines/readability/begin-end/>Begin-End - Compound Only</a></li>
<li data-nav-id=/navpatterns/3-cal-coding-guidelines/readability/binary-operator-line-start/ title="Binary Operator to Start Line" class=dd-item><a href=/navpatterns/3-cal-coding-guidelines/readability/binary-operator-line-start/>Binary Operator to Start Line</a></li>
<li data-nav-id=/navpatterns/3-cal-coding-guidelines/readability/blank-lines/ title="Blank Lines.md" class=dd-item><a href=/navpatterns/3-cal-coding-guidelines/readability/blank-lines/>Blank Lines.md</a></li>
<li data-nav-id=/navpatterns/3-cal-coding-guidelines/readability/blank-lines/ title="Blank Lines" class=dd-item><a href=/navpatterns/3-cal-coding-guidelines/readability/blank-lines/>Blank Lines</a></li>
<li data-nav-id=/navpatterns/3-cal-coding-guidelines/readability/case-actions/ title="CASE Action" class=dd-item><a href=/navpatterns/3-cal-coding-guidelines/readability/case-actions/>CASE Action</a></li>
<li data-nav-id=/navpatterns/3-cal-coding-guidelines/readability/colon-usage-in-case/ title="Colon usage in CASE" class=dd-item><a href=/navpatterns/3-cal-coding-guidelines/readability/colon-usage-in-case/>Colon usage in CASE</a></li>
<li data-nav-id=/navpatterns/3-cal-coding-guidelines/readability/comments-curly-brackets/ title="Comments inside Curly Brackets" class=dd-item><a href=/navpatterns/3-cal-coding-guidelines/readability/comments-curly-brackets/>Comments inside Curly Brackets</a></li>
@ -210,11 +229,6 @@ ALGuidelines.Dev
<div class=wrapper>
<nav id=TableOfContents>
<ul>
<li>
<ul>
<li></li>
</ul>
</li>
<li><a href=#abstract><strong>Abstract</strong></a>
<ul>
<li><a href=#description><strong>Description</strong></a></li>
@ -232,7 +246,7 @@ ALGuidelines.Dev
</div>
<main id=body-inner>
<h1>Use Queries to Replace Nested Loops</h1>
<h4 id=_originally-by-bogdan-sturzoiu-microsoft-development-center-copenhagen_><em>Originally by Bogdan Sturzoiu, Microsoft Development Center Copenhagen</em></h4>
<p><em>Originally by Bogdan Sturzoiu, Microsoft Development Center Copenhagen</em></p>
<h2 id=abstract><strong>Abstract</strong></h2>
<p>This pattern shows how the new query object type introduced in NAV 2013 allows you to replace costly loops when inspecting data from two or more tables.</p>
<h3 id=description><strong>Description</strong></h3>
@ -251,7 +265,7 @@ ALGuidelines.Dev
<li>Process the records.</li>
</ol>
<p><a href=5040.clip_5F00_image002.png><img src=5040.clip_5F00_image002.png alt=" "></a></p>
<p>Figure 1. The pattern elements</p>
<p><em>Figure 1. The pattern elements</em></p>
<h3 id=usage><strong>Usage</strong></h3>
<h4 id=sample-problem><strong>Sample Problem</strong></h4>
<p>The Bank Acc. Reconciliation Line table (274) and the Bank Account Ledger Entry table (271) are connected through the Bank Account No. field. Identify the matching pairs of records based on having the same remaining amount and transaction date.</p>
@ -296,7 +310,7 @@ UNTIL BankAccRecLine.NEXT = 0;
END;</p>
</li>
</ol>
<p>****<strong>Solution Using Query</strong></p>
<p><strong>Solution Using Query</strong></p>
<p>The new query-based approach involves:</p>
<ol>
<li>
@ -405,19 +419,19 @@ END.
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