Question

I have a table called rent on MySQL

id, int (5), autoincrement PRIMARY KEY

dNo, int (5)

pRent, varchar (5)

status, varchar (10)

I need to insert 300 rows into this table

id and dNo need to match

so in the end we will have id/dNo up until 300. How can this be done?

pRent will have a default value of 0

status will have a default value of vacant

What SQL query should I use to insert all 300 rows in at once with id/dNo autoincrement up to 300?

Answer 1

Assuming the id is set to auto increment you can just insert the lot then do an update table set dNo=id

I’m not sure if you can set dNo=id during insert as the id would be NULL

You might be able to set the dNo default value to id

Edit:

INSERT INTO `test` (`id`, `id2`) VALUES ('2', `id`)

Works fine, but not if I set id=NULL.

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Looks like you’ll have to user triggers

CREATE TRIGGER set_nDo AFTER INSERT ON test FOR EACH ROW SET `nDo`=`id`