Scenes:
we have 2 tables
Product table:
Product expansion table:
We need to wash all the data with status=1 in the product table into the expansion table, and sn is our fixed data, and extra is also fixed data.
sn = 10011
extra = ‘test’
sql：
① Construct and get the data set that needs to be inserted in batches
SELECT id AS product_id, '1001' AS sn, 'test' AS extra
FROM product WHERE STATUS=1
Query effect:
② Insert the query results into the product_extra table in batches:
INSERT INTO product_extra
(product_id,sn,extra)SELECT id AS product_id, '1001' AS sn, 'test' AS extra
FROM product WHERE product.STATUS=1
result:
Data batch insertion succeeded
