Question

In MySQL I’m trying to write a Stored Procedure which does the following:

1. Run a SELECT query which returns 1 row with 2 columns (so two pieces of information).
2. Run an INSERT query which includes the two previous values returned and a few parameters which were passed into the stored procedure.

I was originally thinking I could store the two pieces of information from Step 1 into a variable, and then pass those into Step 2. After some reading though it seems that a variable in MySQL can only hold 1 piece of data. How can I get the 2 pieces of information from Step 1 into my INSERT statement in Step 2?

Thank you!

Answer 1

You can use INSERT INTO … SELECT.
Example,

INSERT INTO table1 
SELECT col1, 
       col2, 
       value1, 
       value2 
FROM   table2 

Here you select col1, col2 from table2 and add 2 new custom values value1 and value2 to the result set. This new 4 columns get inserted in to the table1