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SET @v1 = '';
SET @v2 = '';
SET @Query = CONCAT('SELECT sum(colName1), sum(colName2) INTO @v1, @v2 FROM tableName WHERE id=1 ');
PREPARE stmt FROM @Query;
EXECUTE stmt;
DEALLOCATE PREPARE stmt;
SET @Query = CONCAT('SELECT id, name,',@v1,' as value1, ',@v2,' as value2 FROM tableName WHERE id=1 ');
PREPARE stmt FROM @Query;
EXECUTE stmt;
DEALLOCATE PREPARE stmt;
在讀取值時拋出異常 - 列'值1'不屬於表。MySQL的存儲過程從幾秒鐘查詢返回變量的值?
我怎樣才能得到@ v1和v2的@的價值。
請幫幫我。