Question

我的表格[Table]有3列[Column1]，[Column2]和[Column3]。

我的条件是：

WHERE [Column1] LIKE '%q%' OR [Column2] LIKE '%q%' OR [Column3] LIKE '%q%'

它有效，但我想根据匹配数量来订购结果。

例如

C1 - C2 - C3 
q - q - q
q - a - q
q - a - a

Answer 1

在查询中尝试此ORDER BY子句：

ORDER BY (CASE WHEN [Column1] LIKE '%q%' THEN 1 ELSE 0 END +
          CASE WHEN [Column2] LIKE '%q%' THEN 1 ELSE 0 END +
          CASE WHEN [Column3] LIKE '%q%' THEN 1 ELSE 0 END) DESC

Answer 2

SELECT [Column1], [Column2], [Column3] FROM [Table]
WHERE [Column1] LIKE '%q%' OR [Column2] LIKE '%q%' OR [Column3] LIKE '%q%'
ORDER BY 
    (CASE WHEN [Column1] LIKE '%q%' THEN 1 ELSE 0 END) +
    (CASE WHEN [Column2] LIKE '%q%' THEN 1 ELSE 0 END) +
    (CASE WHEN [Column3] LIKE '%q%' THEN 1 ELSE 0 END)
    DESC

Answer 3

您应该添加第四列，类似于：

SELECT [Col1],[Col2],[Col3], 
   CAST([Col1] LIKE '%q%' AS SMALLINT) + CAST([Col2] LIKE '%q%' AS SMALLINT) +
   CAST([Col3] LIKE '%q%' AS SMALLINT) AS Strength
....
ORDER BY Strength

由于我不知道您正在使用哪个数据库，因此您可能需要查阅文档以了解如何从布尔值转换为整数。

伊泰

计算符合条件的列数

3 个答案: