How to write a Stored Procedure to Select, Delete and then Insert?

Question

I am loading a sample data for my UI testing and for that I am trying to check if the data exists. If it is then delete it and insert the new one instead. I got almost 9 inserts and I am not sure if I need to check for each row if it exists then delete each row then insert.

This is the sample data that I am trying to load using SP.

INSERT INTO TRANS_MDATA (TRANSACTION_ID, MDATA_ATTRB, MDATA_VALUE, CREATED_TIME, LAST_MOD_TIME, ISACTIVE) VALUES 
(212019, 'SOURCE', 'COMP', getDate(), getDate(), 1); 

INSERT INTO TRANS_MDATA (TRANSACTION_ID, MDATA_ATTRB, MDATA_VALUE, CREATED_TIME, LAST_MOD_TIME, ISACTIVE) VALUES 
(212019, 'SOURCE', 'COMP1', getDate(), getDate(), 1); 

INSERT INTO TRANS_MDATA (TRANSACTION_ID, MDATA_ATTRB, MDATA_VALUE, CREATED_TIME, LAST_MOD_TIME, ISACTIVE) VALUES 
(212019, 'SOURCE', 'COMP2', getDate(), getDate(), 2);  

INSERT INTO TRANS_MDATA (TRANSACTION_ID, MDATA_ATTRB, MDATA_VALUE, CREATED_TIME, LAST_MOD_TIME, ISACTIVE) VALUES 
(212019, 'SOURCE', 'COMP3', getDate(), getDate(), 3); 

INSERT INTO TRANS_MDATA (TRANSACTION_ID, MDATA_ATTRB, MDATA_VALUE, CREATED_TIME, LAST_MOD_TIME, ISACTIVE) VALUES 
(212019, 'SOURCE', 'COMP4', getDate(), getDate(), 4); 

INSERT INTO TRANS_MDATA (TRANSACTION_ID, MDATA_ATTRB, MDATA_VALUE, CREATED_TIME, LAST_MOD_TIME, ISACTIVE) VALUES 
(212019, 'SOURCE', 'COMP5', getDate(), getDate(), 5); ; 

INSERT INTO TRANS_MDATA (TRANSACTION_ID, MDATA_ATTRB, MDATA_VALUE, CREATED_TIME, LAST_MOD_TIME, ISACTIVE) VALUES 
(212019, 'SOURCE', 'COMP6', getDate(), getDate(), 6);  

INSERT INTO TRANS_MDATA (TRANSACTION_ID, MDATA_ATTRB, MDATA_VALUE, CREATED_TIME, LAST_MOD_TIME, ISACTIVE) VALUES 
(212019, 'SOURCE', 'COMP7', getDate(), getDate(), 7);  

INSERT INTO TRANS_MDATA (TRANSACTION_ID, MDATA_ATTRB, MDATA_VALUE, CREATED_TIME, LAST_MOD_TIME, ISACTIVE) VALUES 
(212019, 'SOURCE', 'COMP8', getDate(), getDate(), 8); 

Stored Procedure

CREATE PROCEDURE TRANSACTION
@TRANSACTION_ID int,
@MDATA_ATTRB varchar,
@MDATA_VALUE varchar,
@ISACTIVE bit

AS
BEGIN
IF EXISTS (SELECT * FROM TRANS_MDATA WHERE TRANSACTION_ID = @TRANSACTION_ID)

BEGIN
DELETE FROM TRANS_MDATA WHERE TRANSACTION_ID = @TRANSACTION_ID
END

ELSE
INSERT INTO TRANS_MDATA (TRANSACTION_ID, MDATA_ATTRB, MDATA_VALUE, CREATED_TIME, LAST_MOD_TIME, ISACTIVE)
VALUES (@TRANSACTION_ID, MDATA_ATTRB, MDATA_VALUE, getdate(), getDate(), @ISACTIVE)
END 
END

EXEC [TRANSACTION]
@TRANSACTION_ID = 123456,
@MDATA_ATTRB = 'Source',
@MDATA_VALUE = 'Backend',
@ISACTIVE bit = 1

Answer 1

You can use EXCEPT in your insert to check for data matching across many columns:

--  Set up a CTE pseudo-table of your test data:
; WITH TestValues
AS (
    SELECT DISTINCT TRANSACTION_ID, MDATA_ATTRB, MDATA_VALUE, CREATED_TIME, LAST_MOD_TIME, ISACTIVE
    FROM (
    VALUES (212019, 'SOURCE', 'COMP', getDate(), getDate(), 1)
        , (212019, 'SOURCE', 'COMP1', getDate(), getDate(), 1)
        ,(212019, 'SOURCE', 'COMP2', getDate(), getDate(), 2)
        ,(212019, 'SOURCE', 'COMP3', getDate(), getDate(), 3)
        ,(212019, 'SOURCE', 'COMP4', getDate(), getDate(), 4)
        ,(212019, 'SOURCE', 'COMP5', getDate(), getDate(), 5)
        ,(212019, 'SOURCE', 'COMP6', getDate(), getDate(), 6)
        ,(212019, 'SOURCE', 'COMP7', getDate(), getDate(), 7)
        ,(212019, 'SOURCE', 'COMP8', getDate(), GETDATE(), 8) 
    ) t1 (TRANSACTION_ID, MDATA_ATTRB, MDATA_VALUE, CREATED_TIME, LAST_MOD_TIME, ISACTIVE)
    )
    --  Insert anything not already in the target table (EXCEPT):
    INSERT INTO TRANS_MDATA(TRANSACTION_ID, MDATA_ATTRB, MDATA_VALUE, CREATED_TIME, LAST_MOD_TIME, ISACTIVE)
    SELECT TRANSACTION_ID, MDATA_ATTRB, MDATA_VALUE, CREATED_TIME, LAST_MOD_TIME, ISACTIVE
    FROM TestValues
    EXCEPT
    SELECT TRANSACTION_ID, MDATA_ATTRB, MDATA_VALUE, CREATED_TIME, LAST_MOD_TIME, ISACTIVE
    FROM TRANS_MDATA