Stored Procedure between two tables? - mysql

Question

Let's say I have two tables, table-a and table-b.
Table-a has the following columns: product_id, mission_id, mission_status, mission_source, mission_destinition.
Table-b has two columns: product_id, location_id.
If I were to write a stored procedure which removes a row from table-a where mission_status=1, and then automatically create a new row in table-b consisting of the product_id and mission_destination from the row just removed in table-a, how would I write the stored procedure?

Answer 1

There are a few different ways to accomplish this. As someone said above, a trigger may be the way to go. Here's a simple script that might work in this case.
--Create test tables
CREATE TABLE #TEMP1
(
product_id int,
mission_Id int,
mission_status int,
mission_source int,
mission_destination VARCHAR(50)
);
CREATE TABLE #TEMP2
(
product_id int,
location_id VARCHAR(50)
);
--Test data
INSERT INTO #TEMP1
VALUES(1,1,1,2,'Mars')
INSERT INTO #TEMP1
VALUES(2,1,1,2,'Jupiter')
INSERT INTO #TEMP1
VALUES(3,1,1,2,'Venus')
INSERT INTO #TEMP1
VALUES(4,1,1,2,'Saturn')
--Check for mission_status of 1
SELECT product_id, mission_destination FROM #TEMP1 WHERE mission_status = 1
IF ##ROWCOUNT > 0
BEGIN
INSERT INTO #TEMP2 (product_id,location_id) SELECT product_id, mission_destination FROM #TEMP1 WHERE mission_status = 1
DELETE FROM #TEMP1 WHERE mission_status = 1
END
SELECT * FROM #TEMP1
SELECT * FROM #TEMP2