ѧϰ T SQL (1)
»ùÓÚmsdn ÏêϸѧϰT-SQL (http://msdn.microsoft.com/zh-cn/library/bb510741.aspx)
Aggregate function--Sum() Two Sample from msdn
USE AdventureWorks;
GO
SELECT Color, SUM(ListPrice), SUM(StandardCost)
from Production.Product
WHERE Color IS NOT NULL
AND ListPrice != 0.00
AND Name LIKE 'Mountain%'
GROUP BY Color
ORDER BY Color;
GO
USE AdventureWorks;
GO
SELECT Color, ListPrice, StandardCost
from Production.Product
WHERE Color IS NOT NULL
AND ListPrice != 0.00
AND Name LIKE 'Mountain%'
ORDER BY Color
COMPUTE SUM(ListPrice), SUM(StandardCost) BY Color;
GO
Ïà¹ØÎĵµ£º
/***************************************************
×÷Õߣºherowang(ÈÃÄãÍû¼ûÓ°×ÓµÄǽ£©
ÈÕÆÚ£º2010.1.5
×¢£º תÔØÇë±£Áô´ËÐÅÏ¢
......
Standard Security:
"Data Source=Aron1;Initial
Catalog=pubs;User Id=sa;Password=asdasd;"
- or -
"Server=Aron1;Database=pubs;User
ID=sa;Pass ......
Ò»¡¢±³¾°½éÉÜ
¡¡¡¡
¡¡¡¡½á¹¹»¯²éѯÓïÑÔ(Structured Query Language£¬¼ò³ÆSQL)ÊÇÓÃÀ´·ÃÎʹØϵÐÍÊý¾Ý¿âÒ»ÖÖͨÓÃÓïÑÔ£¬ÊôÓÚµÚËÄ´úÓïÑÔ£¨4GL£©£¬ÆäÖ´ÐÐÌصãÊǷǹý³Ì»¯£¬¼´²»ÓÃÖ¸Ã÷Ö´ÐеľßÌå·½·¨ºÍ;¾¶£¬¶øÊǼòµ¥µØµ÷ÓÃÏàÓ¦Óï¾äÀ´Ö±½ÓÈ¡µÃ½á¹û¼´¿É¡£ÏÔÈ»£¬ÕâÖÖ²»¹Ø×¢ÈκÎʵÏÖϸ½ÚµÄÓïÑÔ¶ÔÓÚ¿ª·¢ÕßÀ´ËµÓÐ׿«´óµÄ±ãÀû¡£È»¶ø£¬Ó ......
ÔÚWhere×Ó¾äÖУ¬¿ÉÒÔ¶Ôdatetime¡¢char¡¢varchar×Ö¶ÎÀàÐ͵ÄÁÐÓÃLike×Ó¾äÅäºÏͨÅä·ûÑ¡È¡ÄÇЩ“ºÜÏñ...”µÄÊý¾Ý¼Ç¼£¬ÒÔÏÂÊÇ¿ÉʹÓõÄͨÅä·û£º
% Áã»òÕ߶à¸ö×Ö·û
_ µ¥Ò»ÈκÎ×Ö·û£¨Ï»®Ïߣ©
\ ÌØÊâ×Ö·û
[] ÔÚijһ·¶Î§ÄÚµÄ×Ö·û£¬Èç ......
ORACLE SQLÓÅ»¯
£¨1£© Ñ¡Ôñ×îÓÐЧÂʵıíÃû˳Ðò(Ö»ÔÚ»ùÓÚ¹æÔòµÄÓÅ»¯Æ÷ÖÐÓÐЧ)£º
ORACLE µÄ½âÎöÆ÷°´ÕÕ´ÓÓÒµ½×óµÄ˳Ðò´¦Àífrom ×Ó¾äÖеıíÃû£¬from ×Ó¾äÖÐдÔÚ×îºóµÄ±í
(»ù´¡±ídriving table)½«±»×îÏÈ´¦Àí£¬ÔÚfrom ×Ó¾äÖаüº¬¶à¸ö±íµÄÇé¿öÏÂ,Äã±ØÐëÑ¡Ôñ¼Ç
¼ÌõÊý×îÉٵıí×÷Ϊ»ù´¡±í¡£Èç¹ûÓÐ3¸öÒÔÉϵıíÁ¬½Ó²éѯ, ÄǾÍÐè ......