How to insert a date to new column in table 2 based on product_Id and match the (product

Table 1

Id	place	expiry_date
10	xyz	2022-09-12

Table 2 - expiry_date is the new column created in table 2. Need to fetch expiry date from table 1 where T1_id (in table 2) matches id (in table 1)

Oid	userid	expiry_date	T1_id
2	123		10

How to fetch expiry date (table 1 and fill the new column in table 2) only if the T1_id and Id(table 1) matches

Trying

insert into (sql) statements 
Joins used 
Join table1.Id on table2.T1_id

CodePudding user response：

Insert statements won't allow you to change values from an existing table, they only allow you to add brand new rows to a table. In your case you may want to use an UPDATE statement.

In order to get matches between the two tables, you can apply a JOIN operation within the UPDATE statement, using the condition you pointed in your post description.

UPDATE     tab2 
INNER JOIN tab1
        ON tab1.Id = tab2.T1_id
SET tab2.expiry_date = tab1.expiry_date;

Check the demo here.