將動態SQL的結果轉換為sql-server的變量
繁華開滿天機
2019-12-11 13:09:42
3 回答
30秒到達戰場
TA貢獻1828條經驗 獲得超6個贊
DECLARE @sqlCommand nvarchar(1000)
DECLARE @city varchar(75)
declare @counts int
SET @city = 'New York'
SET @sqlCommand = 'SELECT @cnt=COUNT(*) FROM customers WHERE City = @city'
EXECUTE sp_executesql @sqlCommand, N'@city nvarchar(75),@cnt int OUTPUT', @city = @city, @cnt=@counts OUTPUT
select @counts as Counts
浮云間
TA貢獻1829條經驗 獲得超4個贊
您可能已經嘗試過了，但是您的規格是否可以執行此操作？
DECLARE @city varchar(75)
DECLARE @count INT
SET @city = 'London'
SELECT @count = COUNT(*) FROM customers WHERE City = @city
BIG陽
TA貢獻1859條經驗 獲得超6個贊
動態版本
ALTER PROCEDURE [dbo].[ReseedTableIdentityCol](@p_table varchar(max))-- RETURNS int
AS
BEGIN
-- Declare the return variable here
DECLARE @sqlCommand nvarchar(1000)
DECLARE @maxVal INT
set @sqlCommand = 'SELECT @maxVal = ISNULL(max(ID),0)+1 from '+@p_table
EXECUTE sp_executesql @sqlCommand, N'@maxVal int OUTPUT',@maxVal=@maxVal OUTPUT
DBCC CHECKIDENT(@p_table, RESEED, @maxVal)
END
exec dbo.ReseedTableIdentityCol @p_table='Junk'
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