The following code block has a generic SQL syntax of the UPDATE command to modify the data in the My SQL table − The WHERE clause is very useful when you want to update the selected rows in a table.
This will use the SQL UPDATE command with the WHERE clause to update the selected data in the My SQL table tutorials_tbl.
If an update on a row would result in a violation of a primary key or unique index, the update on that row is not performed.
There may be a requirement where the existing data in a My SQL table needs to be modified. This will modify any field value of any My SQL table.
(This is because the order in which the rows are updated determines which rows are ignored.) Such statements produce a warning in the error log when using statement-based mode and are written to the binary log using the row-based format when using mode.
The following My SQL statement will update receive_qty, pub_lang, and receive_dt columns with new values 20, Hindi and 2008-07-10 if purch_price is more than 50.
My SQL UPDATE with WHERE My SQL UPDATE command can be used with WHERE clause to filter (against certain conditions) which rows will be updated.
The following My SQL statement will update the 'receive_qty' column of newpurchase table with a new value 25 if the value of purch_price is more than 50.
bval2 of table12 must be matched with the cval1 of table13 - then the following code can be used.
The above query will update all the instances of CDRECORD in your column aet.