子查询中含有来自查询表的条件的containstable

Question

此查询为我提供错误：“建议”附近的语法错误。

SELECT(SELECT COUNT(*) FROM CONTAINSTABLE(Products,keywords,Suggestion)) InventoryRank 
FROM (
    SELECT Suggestion FROM aTable 
) 

我该如何给出相同的结果？

Answer 1

CONTAINSTABLE在搜索条件下无法使用表列。你可以把它想：

DECLARE @search nvarchar(4000) 

SELECT @search = STUFF(( 
    SELECT '*" or "' + Suggestion 
    FROM aTable 
    FOR XML PATH('') 
),1,6,'') +'*"' 

--That will give you string like "sug1*" or "sug2*" or "sug3*" to search 
--You can make whatever you need string. F.e. "sug1" or "sug2" or "sug3" 

SELECT COUNT (*) 
FROM CONTAINSTABLE(searched_table,searched_column,@search) 

编辑

如果你需要每Suggestion不同InventoryRank，您可以使用动态SQL和临时表：

IF OBJECT_ID(N'##temp') IS NOT NULL DROP TABLE ##temp 

CREATE TABLE ##temp (
    Suggestion nvarchar(max), 
    InventoryRank int 
) 

DECLARE @sql nvarchar(max) 


SELECT @sql = (
    SELECT N'INSERT INTO ##temp SELECT '''+Suggestion+''' as Suggestion, COUNT (*) as InventoryRank FROM CONTAINSTABLE(searched_table,searched_column,'''+Suggestion+''');' 
    FROM aTable 
    FOR XML PATH('') 
) 
--PRINT(@sql) 

EXEC sp_executesql @sql 

SELECT * 
FROM ##temp 

PRINT会给您查询：

INSERT INTO ##temp SELECT 'sug1' as Suggestion, COUNT (*) as InventoryRank FROM CONTAINSTABLE(searched_table,searched_column,'sug1'); 
INSERT INTO ##temp SELECT 'sug2' as Suggestion, COUNT (*) as InventoryRank FROM CONTAINSTABLE(searched_table,searched_column,'sug2'); 

所以你do'nt需要一个WHILE循环或光标通过的所有行aTable

Answer 2

运行的CONTAINSTABLE第三个参数必须是文字或变量，它不能是列名。如果你需要每个建议的数量，你可以尝试以下方法：

DECLARE @suggestion varchar(100); 
DECLARE @result table (Suggestion varchar(100), Result int); 
DECLARE csr CURSOR FOR SELECT Suggestion FROM aTable; 

FETCH NEXT FROM csr INTO @suggestion; 

WHILE @@FETCH_STATUS = 0 BEGIN 
    INSERT INTO @result (Suggestion, Result) 
     SELECT @suggestion, (SELECT COUNT(*) FROM CONTAINSTABLE(Products,keywords,@suggestion)); 
    FETCH NEXT FROM csr INTO @suggestion; 
END 

CLOSE csr; 
DEALLOCATE csr; 

SELECT * FROM @result; 

MSDN CONTAINSTABLE (Transact-SQL)文档。