php - 计数mysql联合类型查询

我有一个联合类型查询。如何计算查询的行数？

mysql_query(
    "  (SELECT 1 as sort_col,performerid,pic0
          FROM $table
          WHERE performerid IS NOT NULL $performeridSql)
    UNION
       (SELECT 2 as sort_col,performerid,pic0
          FROM $table
          WHERE performerid IS NOT NULL
              $categorySql $buildSql
              $breastsize $haircolor $age $ethnicity
              $willingnessSql)
          ORDER BY sort_col");

最佳答案

只需计算子查询结果...

SELECT COUNT(t.*) FROM
(   (SELECT 1 AS sort_col,performerid,pic0
       FROM $table
       WHERE performerid IS NOT NULL
         $performeridSql)
  UNION
    (SELECT 2 AS sort_col,performerid,pic0
       FROM $table
       WHERE performerid IS NOT NULL
         $categorySql $buildSql
         $breastsize $haircolor $age $ethnicity
         $willingnessSql)
  ORDER BY sort_col)
) AS t

关于php - 计数mysql联合类型查询，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/8580039/