Question

I am currently working on a webbased systen using a Mysql db.

I realised that I had initially set up the columns within the tables incorrectly and

I now need to move the data from one table column (receiptno) in table (clients) into a similar table column(receiptno) in table (revenue).

I am still quite inexperienced with Mysql and therefore I dont know the the mysql syntax to accomplish this.

Can I get some help on it.

Thanks

Answer 1

If you simply wanted to insert the data into new records within the revenue table:

INSERT INTO revenue (receiptno) SELECT receiptno FROM clients;

However, if you want to update existing records in the revenue table with the associated data from the clients table, you would have to join the tables and perform an UPDATE:

UPDATE revenue JOIN clients ON **join_condition_here**
SET    revenue.receiptno = clients.receiptno;

Learn about SQL joins.