Compare two table using dynamic database - sql

Question

I have 2 table (same name) on 2 different database
I want compare these table, this is my procedure
ALTER PROCEDURE COUNTCOLUMN
#TABLENAME NVARCHAR(MAX),
#DATABASENAME1 NVARCHAR(MAX),
#DATABASENAME2 NVARCHAR(MAX)
AS
BEGIN
DECLARE #COLNAME NVARCHAR(MAX)
DECLARE #ROWCOUNT INT
DECLARE #ROWCOUNT2 INT
DECLARE #NUMB1 INT
DECLARE #NUMB2 INT
DECLARE #SQLQUERY NVARCHAR(MAX)
DECLARE #SQLQUERY2 NVARCHAR(MAX)
DECLARE #SQLQUERY3 NVARCHAR(MAX)
DECLARE #SQLQUERY4 NVARCHAR(MAX)
DECLARE #SQLQUERY5 NVARCHAR(MAX)
DECLARE #SQLQUERY6 NVARCHAR(MAX)
SET #SQLQUERY = 'SELECT #NUMBER = COUNT(*) FROM information_schema.columns WHERE table_name = '+N'#TESTTB'+''
SET #SQLQUERY2 = 'USE ' + #DATABASENAME1
SET #SQLQUERY3 = 'USE ' + #DATABASENAME2
EXECUTE sp_executesql #SQLQUERY2
EXECUTE sp_executesql #SQLQUERY, N'#TESTTB NVARCHAR(MAX), #NUMBER INT OUTPUT',#TESTTB = #TABLENAME ,#NUMBER = #NUMB1 OUTPUT
EXECUTE sp_executesql #SQLQUERY3
EXECUTE sp_executesql #SQLQUERY, N'#TESTTB NVARCHAR(MAX), #NUMBER INT OUTPUT',#TESTTB = #TABLENAME ,#NUMBER = #NUMB2 OUTPUT
IF(#NUMB1 <= #NUMB2)
BEGIN
DECLARE #NUMB INT
SET #NUMB = 1
WHILE (#NUMB <= #NUMB1)
BEGIN
IF (EXISTS (SELECT * FROM INFORMATION_SCHEMA.TABLES
WHERE TABLE_NAME = 'TEMP1'))
BEGIN
DROP TABLE TEMP1
END
IF (EXISTS (SELECT * FROM INFORMATION_SCHEMA.TABLES
WHERE TABLE_NAME = 'TEMP2'))
BEGIN
DROP TABLE TEMP2
END
ELSE
BEGIN
SET #SQLQUERY4 = 'SELECT #COL_NAME = COL_NAME(OBJECT_ID(#TABLENAME), #NUMB)'
EXECUTE sp_executesql #SQLQUERY2
EXECUTE sp_executesql #SQLQUERY4, N'#TABLENAME NVARCHAR(MAX),#NUMB INT, #COL_NAME NVARCHAR(MAX) OUTPUT', #TABLENAME = #TABLENAME,#NUMB=#NUMB, #COL_NAME = #COLNAME OUTPUT
SET #SQLQUERY5 = 'SELECT '+ #COLNAME + ' INTO TEST_DB..TEMP1 FROM ' + #TABLENAME
EXECUTE sp_executesql #SQLQUERY2
EXECUTE sp_executesql #SQLQUERY5
EXECUTE sp_executesql #SQLQUERY3
EXECUTE sp_executesql #SQLQUERY4, N'#TABLENAME NVARCHAR(MAX),#NUMB INT, #COL_NAME NVARCHAR(MAX) OUTPUT', #TABLENAME = #TABLENAME,#NUMB=#NUMB, #COL_NAME = #COLNAME OUTPUT
SET #SQLQUERY6 = 'SELECT ' + #COLNAME +' INTO TEST_DB..TEMP2 FROM '+ #TABLENAME
EXECUTE sp_executesql #SQLQUERY3
EXECUTE sp_executesql #SQLQUERY6
SELECT #ROWCOUNT = COUNT(*) FROM TEMP1
SELECT #ROWCOUNT2 = COUNT(*) FROM TEMP2
IF(#ROWCOUNT != #ROWCOUNT2)
BEGIN
PRINT N'NUMBER OF ROWS ARE NOT EQUAL';
BREAK
END
ELSE IF (#NUMB > #NUMB1)
BREAK
ELSE
BEGIN
SELECT * FROM TEST_DB..TEMP1
EXCEPT
SELECT * FROM TEST_DB..TEMP2
SET #NUMB = #NUMB + 1;
CONTINUE
END
END
END
END
END
It should be like this TEMP1 <--TEST_DB..TESTTABLE, TEMP2 <--TEST_DB2..TESTTABLE
But TEMP1 , TEMP2 always have the same values as TESTTABLE from the first database (TEST_DB )
It seem like I can't switch between two databases in procedure so I try to run it separate but still not work