1.7.5 CQL Simple UPDATE

{[],
 update(se_lt_x, [c-100]),
 @ :: [a-'A1'],
 row_count(N)}

This corresponds to UPDATE se_lt_x SET c=100 WHERE se_lt_x.a='A1'. The’@’is a special alias referring to the table that is being updated. The row_count/1 term gives the number or rows updated.