Question

我有一个要求，我必须找出已在主表中列出的每个表名的记录数。

主表看起来像： RecordId，TableName，RowCount 最初RowCOunt的所有行都设置为0。

我做的是，创建了一个光标

declare @tName nvarchar(max)
declare @query nvarchar(max)
declare @count int = 0
declare curCount cursor for select TableName from MasterTable
open curCount
fetch next from curCount into @tName
while @@fetch_status=0
begin
    set @tName = @tName
    set @query = N'select count(ID) from ['+@tName+']';
    set @count = execute @query
    update @tempTbl set RecordCount = @count where TableName  = @tName
    print @query
    fetch next from curCount into @tName
end
close curCount
deallocate curCount

在这一点上每次都给我错误设置@count = execute @query，错误是：关键字'exec'附近的语法不正确。

我也尝试了sp_executesql @query ...它也给了我错误，错误是'@query'附近的语法不正确。

请帮我解决这个问题。

Answer 1

您可以将sp_executesql与输出参数一起使用来获取值。请试试这个：

declare @tName nvarchar(max)
declare @query nvarchar(max)
declare @count int = 0
declare curCount cursor for select TableName from MasterTable
open curCount
fetch next from curCount into @tName
while @@fetch_status=0
begin
    set @tName = @tName
    set @query = N'select count(ID) from ['+@tName+']';
    --set @count = execute @query

    EXEC sp_executesql @query, 
                   N'@count int OUTPUT', 
                   @count = @count OUTPUT


    update @tempTbl set RecordCount = @count where TableName  = @tName
    print @query
    fetch next from curCount into @tName
end
close curCount
deallocate curCount

Answer 2

仅当我在select语句中也添加了变量时才为我工作。替换为： set @query = N'select count(ID) from ['+@tName+']'; 有了这个： set @query = N'select @count=count(ID) from ['+@tName+']';

执行count in cursor，sql server

2 个答案: