Changing data sorting and grouping
You can use one or multiple fields as a basis for sorting report data. You can also organize report data by grouping it according to a specific field(s). Grouping allows you to have your report data presented as collections that are related.
Sorting data
| The instructions documented are for SQL Server 2016. Your steps may be different if you are using a different version of SQL Server. | 
You can sort data by a single field or by multiple fields. When you sort using multiple fields, SSRS uses a hierarchical method to sort it. You can sort data first by one field and then by another field(s).
To sort report data by one or multiple fields, follow these steps.
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Open your report in Report Builder.
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Left-click on the needed Row Group and select Group Properties.

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Click Sorting.
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Click Add.
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In the Sort by field, click the down arrow to display a list of available fields for the report.
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Select the field you want to use as a basis to sort the data.
To add more sorting fields, repeat Steps 4 through 6. - 
Under Order, select one of the following options:
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A to Z to sort data in ascending order
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Z to A to sort data in descending order
 
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Click OK.
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Click Run.
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Save your changes to the report.
Note: Be sure you are saving the changes to the copy of the template. 
Grouping data
| The instructions documented are for SQL Server 2016. Your steps may be different if you are using a different version of SQL Server. | 
To have your report data presented as collections that are related, use grouping.
To group data by a specific field:
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Open your report in Report Builder.
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Left-click on the needed Row Group and select Add Group > Parent Group.
The Tablix group window opens.
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In the Group by field, click the down arrow to display a list of available fields for the report.
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Select the field you want to use as a basis to group the data.
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If needed, select the Add group header or Add group footer check boxes.
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Click OK.
When a field by which you want to group data is currently in your report, delete the current field to avoid duplication. - 
Click Run.
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Save your changes to the report.
Note: Be sure you are saving the changes to the copy of the template.