通过PHP更新SQL中的记录

Question

如何从数据库更新记录？

$query = "UPDATE studentinfo SET firstname= '".$student['fname']."' and lastname='".$student['faname']."' and gender = 'Male' WHERE id = '".$student['id']."'"; 

Answer 1

UPDATE table SET column1 = 'value1', column2 = 'value2'

不要使用AND来分隔SET子句中的术语。

Answer 2

$query = "UPDATE studentinfo SET firstname= '".$student['fname']."', lastname='".$student['faname']."', gender = 'Male' WHERE id = '".$student['id']."'";

Answer 3

AND在SQL中用于多个条件。

要更新多个字段，只需用逗号分隔：

$query ="UPDATE studentinfo 
SET firstname = '$student['fname']', lastname = '$student['faname']', gender = 'Male'
WHERE id = '$student['id']'";