大家好,又见面了,我是你们的朋友全栈君。此类问题一般出现于动态存储过程,我以up_selectTradeInfo为例简单说明该问题的解决方法
–建表
–银行卡表
GO
USE BankCardManageDB
GO
IF EXISTS (SELECT * FROM sys.objects WHERE NAME=’BankCard’)
DROP TABLE BankCard
CREATE TABLE BankCard
(
ID int identity(1,1),
CardID char(10) PRIMARY KEY,
BankName varchar(20) NOT NULL,
UserName varchar(20) NOT NULL,
Deposit money NOT NULL DEFAULT(0),
Payout money NOT NULL DEFAULT(0)
)
GO
–交易记录表
USE BankCardManageDB
IF EXISTS(SELECT * FROM sys.objects WHERE NAME=’Trade’)
DROP TABLE Trade
CREATE TABLE Trade
(
TradeID BIGINT PRIMARY KEY IDENTITY(1,1),
CardID CHAR(10) FOREIGN KEY REFERENCES BankCard(CardID) NOT NULL,
TradeDate DATETIME NOT NULL,
TradeMoney MONEY CHECK(TradeMoney>0),
TradeType char(8) CHECK(TradeType=’存钱’ or TradeType=’取钱’)
)
GO
–插入测试数据
INSERT INTO BankCard VALUES(‘123456766′,’工商银行’,’田国兴’,2000,200)
INSERT INTO Trade VALUES(‘123456766′,’20080921′,30000,’存钱’)
–创建存储过程 up_selectTradeInfo 查询时间段内卡的交易信息
USE BankCardManageDB
GO
IF EXISTS(SELECT * FROM sys.objects WHERE name=’up_selectTradeInfo’)
DROP PROCEDURE up_selectTradeInfo
GO
CREATE PROCEDURE up_selectTradeInfo
@cardID varchar(10),
@startDate smalldatetime,–时间上限
@endDate smalldatetime –时间下限
AS
BEGIN
DECLARE @sqlStr varchar(300)
SET @sqlStr=’SELECT * FROM Trade WHERE CardID=’ str(@cardID)
’ AND TradeDate BETWEEN ‘ @startDate ’ AND ‘ @endDate
EXEC(@sqlStr)
END
exec up_selectTradeInfo ‘123456766’,’20080920′,’20080921′
在执行存储过程时,发生以下错误
消息 295,级别 16,状态 3,过程 up_selectTradeInfo,第 11 行
将字符串转换为 smalldatetime 数据类型时失败。
具体解决办法如下:
把存储过程里面的SET @sqlStr一句改为(嵌套转换)
SET @sqlStr=’SELECT * FROM Trade WHERE CardID=’ str(@cardID)
’ AND TradeDate BETWEEN CONVERT(SMALLDATETIME,’ ”” CONVERT(VARCHAR,@startDate,112) ”” ’,120)’
’ AND CONVERT(SMALLDATETIME,’ ”” CONVERT(VARCHAR,@endDate,112) ”” ’,120)’
(注意:在数据类型为datetime时最好不要使用那个BETWEEN)
再执行
exec up_selectTradeInfo ‘123456766’,’20080920′,’20080921′
返回
TradeID CardID TradeDate TradeMoney TradeType
——————– ———- ———————– ——————— ———
18 123456766 2008-09-21 00:00:00 30000.00 存钱
(1 行受影响)
问题解决!!
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