BI SQL # 231 : SQL Server DBA Scripts : Create Primary Key for all Tables
Hi Folks,
In this article we are going to cover How to Create Primary Key for all Tables.
In this post we are going to discuss following points:
- Problem Statement of SQL Script:
- Description of SQL Script:
- SQL Script Code
- User Level to execute
Problem Statement of SQL Script:
How to Create Primary Key for all Tables?
Description of SQL Script:
This script will Create Primary Key for all Tables .
SQL Script Code
DECLARE @object_id INT; DECLARE @parent_object_id INT; DECLARE @TSQL NVARCHAR(4000); DECLARE @COLUMN_NAME SYSNAME; DECLARE @is_descending_key BIT; DECLARE @col1 BIT; DECLARE @action CHAR(6); --SET @action = 'DROP'; SET @action = 'CREATE'; DECLARE PKcursor CURSOR FOR SELECT kc.object_id ,kc.parent_object_id FROM sys.key_constraints kc INNER JOIN sys.objects o ON kc.parent_object_id = o.object_id WHERE kc.type = 'PK' AND o.type = 'U' AND o.NAME NOT IN ( 'dtproperties' ,'sysdiagrams' ) -- not true user tables ORDER BY QUOTENAME(OBJECT_SCHEMA_NAME(kc.parent_object_id)) ,QUOTENAME(OBJECT_NAME(kc.parent_object_id)); OPEN PKcursor; FETCH NEXT FROM PKcursor INTO @object_id ,@parent_object_id; WHILE @@FETCH_STATUS = 0 BEGIN IF @action = 'DROP' SET @TSQL = 'ALTER TABLE ' + QUOTENAME(OBJECT_SCHEMA_NAME (@parent_object_id)) + '.' + QUOTENAME( OBJECT_NAME(@parent_object_id)) + ' DROP CONSTRAINT ' + QUOTENAME(OBJECT_NAME( @object_id)) ELSE BEGIN SET @TSQL = 'ALTER TABLE ' + QUOTENAME(OBJECT_SCHEMA_NAME (@parent_object_id)) + '.' + QUOTENAME( OBJECT_NAME(@parent_object_id)) + ' ADD CONSTRAINT ' + QUOTENAME(OBJECT_NAME( @object_id)) + ' PRIMARY KEY' + CASE INDEXPROPERTY(@parent_object_id, OBJECT_NAME( @object_id), 'IsClustered') WHEN 1 THEN ' CLUSTERED' ELSE ' NONCLUSTERED' END + ' ('; DECLARE ColumnCursor CURSOR FOR SELECT COL_NAME(@parent_object_id, ic.column_id) ,ic.is_descending_key FROM sys.indexes i INNER JOIN sys.index_columns ic ON i.object_id = ic. object_id AND i.index_id = ic.index_id WHERE i.object_id = @parent_object_id AND i.NAME = OBJECT_NAME(@object_id) ORDER BY ic.key_ordinal; OPEN ColumnCursor; SET @col1 = 1; FETCH NEXT FROM ColumnCursor INTO @COLUMN_NAME ,@is_descending_key; WHILE @@FETCH_STATUS = 0 BEGIN IF (@col1 = 1) SET @col1 = 0 ELSE SET @TSQL = @TSQL + ','; SET @TSQL = @TSQL + QUOTENAME(@COLUMN_NAME) + ' ' + CASE @is_descending_key WHEN 0 THEN 'ASC' ELSE 'DESC' END; FETCH NEXT FROM ColumnCursor INTO @COLUMN_NAME ,@is_descending_key; END; CLOSE ColumnCursor; DEALLOCATE ColumnCursor; SET @TSQL = @TSQL + ');'; END; PRINT @TSQL; FETCH NEXT FROM PKcursor INTO @object_id ,@parent_object_id; END; CLOSE PKcursor; DEALLOCATE PKcursor;
User Level to execute
400
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