SQL : Insert a large number of records using SQL

Learning

Use the below mentioned query to insert multiple records this is the fastest way available.

-- don't add "UNION ALL" statement on the last line

INSERT INTO mytable(companyid, category, sub, catalogueref)
SELECT '10197', 'cat', 'sub', '123' UNION ALL
SELECT '10197', 'cat2', 'sub2', '124' UNION ALL
-- ... other N-thousand rows
SELECT '10197', 'catN-1', 'subN-1', '12312' UNION ALL
SELECT '10197', 'catN', 'subN', '12313';