Question

此查询给出了错误：“建议'附近的语法不正确。”

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

我如何给出相同的结果？

Answer 1

CONTAINSTABLE的第3个参数必须是文字或变量，它不能是列名。如果您需要每个建议的计数，您可以尝试以下方法：

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。

Answer 2

CONTAINSTABLE无法在搜索条件中使用表列。你可以这样做：

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)

修改

如果每个InventoryRank需要不同的Suggestion，则可以使用动态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会给你查询：

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');

所以你不需要WHILE循环或CURSOR来遍历来自aTable的所有行

子查询包含包含来自查询表的条件的containsstable

2 个答案: