Clarified REPLACE command a bit.

@end example

@code{REPLACE} works exactly like @code{INSERT}, except that if an old

record in the table has the same value as a new record on a unique index,

the old record is deleted before the new record is inserted.

record in the table has the same value as a new record on a @code{UNIQUE}

index or @code{PRIMARY KEY}, the old record is deleted before the new

record is inserted.

@xref{INSERT, ,@code{INSERT}}.

In other words, you can't access the values of the old row from a

or replaced a row: check whether the affected-rows value is 1 (added)

or 2 (replaced).

Note that unless you use a @code{UNIQUE} index or @code{PRIMARY KEY},

using a @code{REPLACE} command makes no sense, since it would just do

an @code{INSERT}.

@node LOAD DATA, DO, REPLACE, Data Manipulation

@subsection @code{LOAD DATA INFILE} Syntax