Updating a row in sql using php

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- it checks if one row exists in the table or not, according to the WHERE clause.- it returns all (or only a selection of) fields for that one row, if exists.Disadvantages:- it doesn't return row fields reliable if more than one row found.When updating a Mysql table with identical values nothing's really affected so row Count will return 0. Perl below noted this is not always preferred behaviour and you can change it yourself since PHP 5.3.Just create your PDO object with Note that an INSERT ...

You can also perform more complicated updates in Oracle.Uses: - It is perfect for checking if a user/pass pair is present in a users table and to return the other fields of the user (like name, phone, whatever) if user was found.The Oracle UPDATE statement is used to update existing records in a table in an Oracle database.Too often I’ve seen such queries ran in long loops one at a time, which is very bad for performance (as I will show here) and sometimes equally bad for integrity (if the process is interrupted). Insertion of multiple rows comes about often in batch jobs, database migrations and handling table relationships.A naive approach, via PHP, would be to loop over the data to be inserted, inserting one row at a time.

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