mysql，介于和限制在一起

Question

我想获取特定日期间隔内的所有行，结果集最多为50条记录。什么可以是查询？我不断收到错误：

$sql = "SELECT DISTINCT userId FROM ".$TableName. 
     " where time BETWEEN (NOW() - INTERVAL " 
     .$USER_COUNT_DURATION. 
     " MINUTE AND NOW()) LIMIT 0, ".$limit." ;"; 

Answer 1

看起来像pamentalhesis问题。 “MINUTE AND NOW（））”应该是“MINUTE”且NOW（）“

$sql = "SELECT DISTINCT userId FROM ".$TableName." where time BETWEEN (NOW() - INTERVAL ".$USER_COUNT_DURATION." MINUTE) AND NOW() LIMIT 0, ".$limit." ;";