此准备好的语句Update查询无法正常工作...为什么？

Question

$query="UPDATE `db`.`tb` SET `colA` = ?, `colB` = ?, `colC` = ?, `colD` = ?, `colE` = ?, `colF` = ?, `colG` = ? WHERE `tb`.`colA` = ? AND month(date)= ?;";
$stmt = $web_dbi->prepare($query);
$stmt->bind_param("sssssssss", $colA_PHPvar, $colB_PHPvar, $colC_PHPvar, $colD_PHPvar, $colE_PHPvar, $colF_PHPvar, $colG_PHPvar, $colA_PHPvar, $colB_PHPvar);
$stmt->execute();

Additional information:

1. date is the name of a column in db . tb ...
2. This query works when I remove the AND month(date)= ? from the Where clause and it's corresponding ? variable ...

Answer 1

figured it out ... I was passing a date variable via AJAX that was formatted as the numerical representation of the month (ie January=1 ...), and included the date column as a column to update (formatted as a date in MySQL)(m-1-yyyy), when really I only needed the date column in the Where clause (the numerical representation of month successfully matched month( date ) in database and updated other fields, and correctly format errored while updating date ( date in database is simply the first of the month (m-1-yyyy)) (which can stay the same here) ...

$query="UPDATE `db`.`tb` SET `colA` = ?, `colB` = ?, `colC` = ?, `colE` = ?, `colF` = ?, `colG` = ? WHERE `tb`.`colA` = ? AND month(date)= ?;";
$stmt = $web_dbi->prepare($query);
$stmt->bind_param("sssssssss", $colA_PHPvar, $colB_PHPvar, $colC_PHPvar, $colE_PHPvar, $colF_PHPvar, $colG_PHPvar, $colA_PHPvar, $colB_PHPvar);
$stmt->execute();

( colD and $colD_PHPvar were the date variable being passed via AJAX as a numerical representation of the month (ie January=1 ...) ...