How to maintain previous and record count in audit table in SQL Server 2008 r2?

Question

Hi Experts ,
 Situation :
in our database we are having few of stored procedures which will drop and recreates the tables and it is scheduled on weekly basis. when this job will run all the stored procedures will drop all the tables and recreate. Now we need to create one table which
will maintain history of the records.
my table structure is listed below
TableName CurrentReocrdCount CurrentExecutionDate PreviousReordCount PreviousExurtiondate
TEST         1000                   2014-03-30            NULL        NULL
Test         1500                   2014-04-10            1000      2014-03-30
Test         2000                   2014-04-11            1500      2014-04-10 
How do i achive this . 
franklinsentil

Answer 1

You need to create audit tables for these. The table will be populated by COUNT value inside stored procedure. Each time it clears the main table and fills new data and also logs count details to audit tables. You can use COUNT(*)  to get count value
and GETDATE function to get current execution value.
So proc will look like
CREATE PROC procname
@param....
AS
--step to drop existing table
IF OBJECT_ID('tablename') IS NOT NULL
DROP TABLE <table name>
--step to fill new table
SELECT ...
INTO TableName
FROM
--Audit table fill step
INSERT AuditTable (TableName,CurrentRecordCount,CurrentExecdate,PrevRecordCount,PrevExecDate)
SELECT TOP 1 'TableName',(SELECT COUNT(*) FROM tableName),GETDATE(),CurrentRecordCount,CurrentExecDate
FROM AuditTable
ORDER BY CurrentExecDate DESC
UNION ALL
SELECT 'TableName',(SELECT COUNT(*) FROM tableName),NULL,NULL
WHERE NOT EXISTS (SELECT 1 FROM AuditTable)
GO
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