PHP Databases Handling
Which one of the following methods can be used to diagnose and display information about a MySQL connection error?

mysqli_connect_error()
mysqli_connect_errno()
connect_errno()
connect_error()

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PHP Databases Handling
What will happen at the end of the following sequence of SQL commands?
BEGIN TRANSACTION
DELETE FROM MYTABLE WHERE ID=1
DELETE FROM OTHERTABLE
ROLLBACK TRANSACTION

The contents of OTHERTABLE will be deleted
The contents of OTHERTABLE will be deleted, as will be all the contents of MYTABLE whose ID is 1
The database will remain unchanged
The contents of both OTHERTABLE and MYTABLE will be deleted

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