1,SELECT *,CASE OrderStatus WHEN 1 THEN '未处理' when 2 THEN '锁定' when
3 THEN '已出票' ELSE '过期' END
from dbo.T_OrderItem
2,
SELECT *,CAST(ROUND(CAST (HostWin AS FLOAT)/(HostWin+HostDraw+HostBear),2)*100 AS varchar)+'%' AS HostWinRate,
CAST(ROUND(CAST (HostDraw AS FLOAT)/(HostWin+HostDraw+HostBear),2)*100 AS varchar)+'%'AS HostDrawRate,
CAST(ROUND(CAST (HostBear AS FLOAT)/(HostWin+HostDraw+HostBear),2)*100 AS varchar)+'%' AS HostBearRate from V_DoubleBuy
?Convert.ToDateTime(row.ItemArray[0])
UpSert功能：
MERGE <hint> INTO <table_name>
USING <table_view_or_query>
ON (<condition>)
WHEN MATCHED THEN <update_clause>
WHEN NOT MATCHED THEN <insert_clause>;
MultiTable Inserts功能：
Multitable inserts allow a single INSERT INTO .. SELECT statement to ......
应用程序通过odbc,ado或ado.net与sql server连接,无论通过那种方式进行连接,每一种连接方式,首先要设置的是连接串。以下就说说几种方式的连接串的设置：
先说说odbc连接,odbc全称为开放式数据库连接,是微软最早发布的数据库连接方式。连接串格式如下：driver={sql server};server=服务器安全名;uid=用户名;pwd=密码;databa ......
