BI SQL # 265 : SQL Server DBA Scripts : Compare Data Table

Hi Folks,

In this article we are going to cover How to Compare Data Table.

In this post we are going to discuss following points:

• Problem Statement of SQL Script:
• Description of SQL Script:
• Input Parameter of SQL Script
• SQL Script Code
• User Level to execute

Problem Statement of SQL Script:

How to Compare Data Table?

Description of SQL Script:

This script will Compare Data Table.

Input Parameter of SQL Script

:FirstDatabasename(@Db1)

:SecondDatabasename(@Db1)

:Schemaname(@SchemaName)

:Tablename(@TableName)

SQL Script Code

IF OBJECT_ID('sp_CompareTable') IS NOT NULL
    DROP PROC sp_CompareTable
GO

CREATE PROC sp_CompareTable (
    @Db1 VARCHAR(250)
    ,@Db2 SYSNAME
    ,@SchemaName SYSNAME = 'dbo'
    ,@TableName SYSNAME
    )
AS
DECLARE @reason VARCHAR(7) = 'Missing';
DECLARE @linkedserver SYSNAME;

IF CHARINDEX('.', @db1, 1) <> 0
    SET @Db1 = QUOTENAME(SUBSTRING(@db1, 1, CHARINDEX('.', @db1, 1) 
                - 1)) + '.' + QUOTENAME(SUBSTRING(@db1, CHARINDEX(
                    '.', @db1, 1) + 1, DATALENGTH(@db1) - CHARINDEX
                ('.', @db1, 1)))

IF CHARINDEX('.', @Db2, 1) <> 0
    SET @Db2 = QUOTENAME(SUBSTRING(@Db2, 1, CHARINDEX('.', @Db2, 1) 
                - 1)) + '.' + QUOTENAME(SUBSTRING(@Db2, CHARINDEX(
                    '.', @Db2, 1) + 1, DATALENGTH(@Db2) - CHARINDEX
                ('.', @Db2, 1)))

PRINT @db1

EXEC (
        'select * from  
(SELECT * FROM ' + @db1 + '.' + 
        @SchemaName + '.' + @TableName + 
        '  
EXCEPT 
SELECT * FROM ' + @db2 + '.' + @SchemaName + 
        '.' + @TableName + ') T 
Cross Join (SELECT ''' + @reason 
        + ' in ' + @db2 + '.' + @SchemaName + '.' + @TableName + 
        ''' Reason)T2 
Union ALL 
select * from  
(SELECT * FROM ' 
        + @db2 + '.' + @SchemaName + '.' + @TableName + 
        '  
EXCEPT 
SELECT * FROM ' + @db1 + '.' + @SchemaName + 
        '.' + @TableName + ' ) T Cross Join (SELECT ''' + @reason + 
        ' in ' + @db1 + '.' + @SchemaName + '.' + @TableName + 
        ''' Reason)T2'
        )
GO

User Level to execute

300

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