Sql – Blank out duplicate column values in SQL Reporting Services

reporting-servicessqlsql-server-2008-r2

This has to be stupid easy to do, but I'm not seeing it.

I have a SQL Reporting Services (SQL 1008 R2) report.

I'm using a tablix to basically show:

COL 1 |  COL 2 |  COL 3 |  COL 4
----------------------------------
100   |  100   |  100   |  Item 1
100   |  100   |  101   |  Item 2
100   |  100   |  102   |  Item 3
100   |  110   |  110   |  Item 4
100   |  110   |  110   |  Item 4
100   |  110   |  111   |  Item 5
100   |  110   |  112   |  Item 6

But I want to suppress repeating values in those first two columns so it looks like this:

COL 1 |  COL 2 |  COL 3 |  COL 4
----------------------------------
100   |  100   |  100   |  Item 1
      |        |  101   |  Item 2
      |        |  102   |  Item 3
      |  110   |  110   |  Item 4
      |        |  110   |  Item 4
      |        |  111   |  Item 5
      |        |  112   |  Item 6

I thought it might be as easy as right clicking the column and selecting "Hide duplicate values", but I'm not seeing that.
I'll apologize now because I'm going to feel stupid when someone points out how easy it is to do or find.

Best Answer

It is probably best to simply use groups, but if you want to keep it this way, try:

=IIf(Previous(Fields!Col1.Value) = Fields!Col1.Value, Nothing, Fields!Col1.Value)

Or you can set the textbox's HideDuplicates property to the containing group name (in your case, presumably Tablix1_Details)

Syntax:

ALTER TABLE {TABLENAME} 
ADD {COLUMNNAME} {TYPE} {NULL|NOT NULL} 
CONSTRAINT {CONSTRAINT_NAME} DEFAULT {DEFAULT_VALUE}
WITH VALUES

Example:

ALTER TABLE SomeTable
        ADD SomeCol Bit NULL --Or NOT NULL.
 CONSTRAINT D_SomeTable_SomeCol --When Omitted a Default-Constraint Name is autogenerated.
    DEFAULT (0)--Optional Default-Constraint.
WITH VALUES --Add if Column is Nullable and you want the Default Value for Existing Records.

Notes:

Optional Constraint Name:
If you leave out CONSTRAINT D_SomeTable_SomeCol then SQL Server will autogenerate
a Default-Contraint with a funny Name like: DF__SomeTa__SomeC__4FB7FEF6

Optional With-Values Statement:
The WITH VALUES is only needed when your Column is Nullable
and you want the Default Value used for Existing Records.
If your Column is NOT NULL, then it will automatically use the Default Value
for all Existing Records, whether you specify WITH VALUES or not.

How Inserts work with a Default-Constraint:
If you insert a Record into SomeTable and do not Specify SomeCol's value, then it will Default to 0.
If you insert a Record and Specify SomeCol's value as NULL (and your column allows nulls),
then the Default-Constraint will not be used and NULL will be inserted as the Value.

Notes were based on everyone's great feedback below.
Special Thanks to:
@Yatrix, @WalterStabosz, @YahooSerious, and @StackMan for their Comments.

Mysql – How to SELECT rows with MAX(Column value), PARTITION by another column in MYSQL

You are so close! All you need to do is select BOTH the home and its max date time, then join back to the topten table on BOTH fields:

SELECT tt.*
FROM topten tt
INNER JOIN
    (SELECT home, MAX(datetime) AS MaxDateTime
    FROM topten
    GROUP BY home) groupedtt 
ON tt.home = groupedtt.home 
AND tt.datetime = groupedtt.MaxDateTime

Best Answer

Related Solutions

Sql – Add a column with a default value to an existing table in SQL Server

Syntax:

Example:

Notes:

Mysql – How to SELECT rows with MAX(Column value), PARTITION by another column in MYSQL

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