MySQL插入具有多个字段和where子句

Question

I'm trying to construct a query for a cron that will run.

mysql_query("UPDATE `stocks` SET price='$pricez', open='$openz', high='$highz', low='$lowz', change='$changez', time='$times', percent='$percentz' WHERE symbol = '$symbolz' "); 

The error I get is

You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'change='-0.10', time='1406050151', percent='-0.35%' WHERE symbol = 'ALMB.CO'' at line 1

Scavenged SOF and have yet to find a solution.

Answer 1

Looks like you are using some reserved words for column names: Change and Time You can escape these with backticks (`), or choose new coumn names

UPDATE `stocks` 
SET     `price`='$pricez', 
        `open`='$openz', 
        `high`='$highz', 
        `low`='$lowz', 
        `change`='$changez', 
        `time`='$times', 
        `percent`='$percentz' 
WHERE symbol = '$symbolz' 

Answer 2

Reserved words just bit you: Change is a reserved word thus needs to be escaped: http://dev.mysql.com/doc/refman/5.5/en/reserved-words.html

mysql_query("UPDATE `stocks` SET price='$pricez', open='$openz', high='$highz', 
low='$lowz', `change`='$changez', time='$times', percent='$percentz' WHERE symbol = '$symbolz' ");

So what is a reserved word?

They are words the engine uses to interpert specific requested commands. When these words are used as identifiers for tables or columns they must be treated in a specific manner usually escaping the words for the RDBMS involved.