Question

我有一张名为Photos（Id，Title，Description，Date，Online）的表格。我想按标题和描述搜索表格，但我想首先查看标题搜索的结果，然后查看描述的结果。

我尝试过普通搜索，但不知道如何将它们分开。

SELECT * FROM [Photos] 
WHERE ([Online] = 1) 
AND ([Description] like '%" + querytext + "%') 
OR ([Title] like '%" + querytext + "%') 
ORDER BY [Date] DESC, [Id] DESC

然后我尝试用UNION来做，但也没有用。

SELECT * FROM [Photos] 
WHERE ([Online] = 1) 
AND ([Description] like '%" + querytext + "%') 
UNION 
SELECT * FROM [Photos] 
WHERE ([Online] = 1) 
AND ([Title] like '%" + querytext+ "%') 
ORDER BY [Date] DESC, [Id] DESCBeto

Answer 1

添加一些标记行的列：

SELECT *, 1 AS Mark 
FROM [Photos] 
WHERE ([Online] = 1) 
AND ([Title] like '%" + querytext + "%') 
UNION ALL
SELECT *, 2 AS Mark 
FROM [Photos] 
WHERE ([Online] = 1) 
AND ([Description] like '%" + querytext+ "%') 
ORDER BY Mark, [Date] DESC, [Id] DESC

Answer 2

只需在source上添加UNION字段，将结果放入子查询中并对子查询进行排序。

SELECT *
FROM (
    SELECT 'Description' as source, * FROM [Photos] 
    WHERE ([Online] = 1) 
    AND ([Description] like '%" + querytext + "%') 
    UNION 
    SELECT 'Title' as source, * FROM [Photos] 
    WHERE ([Online] = 1) 
    AND ([Title] like '%" + querytext+ "%') 
    ) T
ORDER BY source DESC, [Date] DESC, [Id] DESC

Answer 3

您可以在CASE子句中使用ORDER BY个表达式：

SELECT *
FROM Photos 
WHERE
  Online = 1 
  AND Description like '%" + querytext + "%'
  OR Title like '%" + querytext + "%'
ORDER BY
  CASE WHEN Title like '%" + querytext + "%' THEN 1 ELSE 2 END,
  [Date] DESC,
  [Id] DESC

Answer 4

SELECT *
FROM (
    SELECT 'Description' as source, * FROM [Photos] 
    WHERE ([Online] = 1) 
    AND ([Description] like '%" + querytext + "%') 
    UNION 
    SELECT 'Title' as title, * FROM [Photos] 
    WHERE ([Online] = 1) 
    AND ([Title] like '%" + querytext+ "%') 
    ) T
ORDER BY title DESC, [Date] DESC, [Id] DESC

Answer 5

试试这个：

SELECT * FROM [Photos] 
WHERE ([Online] = 1) 
AND (([Description] like '%" + querytext + "%') 
OR ([Title] like '%" + querytext + "%')) 
ORDER BY [Date] DESC, [Id] DESC

这个怎么样：

SELECT *, CASE WHEN ([Description] like '%" + querytext + "%') THEN 1 WHEN ([Title] like '%" + querytext + "%') THEN 2 END AS ord  FROM [Photos] 
WHERE ([Online] = 1) 
AND (([Description] like '%" + querytext + "%') 
OR ([Title] like '%" + querytext + "%')) 
ORDER BY [Date] DESC, [Id] DESC , ord DESC

2个字段中的搜索表首先显示第一个结果

5 个答案: