Ò׽ؽØͼÈí¼þ¡¢µ¥Îļþ¡¢Ãâ°²×°¡¢´¿ÂÌÉ«¡¢½ö160KB

SQLÖÐÎÄÎÊÅÅÐò

SQLÖÐÎÄÎÊÅÅÐò
    Ê×ÏÈ°ÑÕâЩÐÅÏ¢ÔÚeditplusÖУ¬×ª»»ÎªÒ»ÁУ¬¿½±´µ½excelÖУ¬¿½±´ºó¼Ç×ÅÔÚµÚÒ»ÐÐÇ°²åÈëÒ»ÐУ¬×÷ΪÁбêÍ·£¬ÀýÈçΪname£¬È»ºóÔÚsqlÖбíÖУ¬µ¼ÈëÊý¾Ý£¬Éú³ÉÒ»¸öÐÂ±í£¬ÀýÈçfenlei£¬´ò¿ªsqlÓï¾äÐУ¬Ö´ÐУº
SELECT *
from Fenlei
ORDER BY name COLLATE Chinese_PRC_CS_AS_KS_WS
    ÕâÊÇ°´Ê××ÖµÄÆ´ÒôÀ´ÅÅÐò¡£
SELECT *
from Fenlei
ORDER BY name COLLATE Chinese_PRC_Stroke_CS_AS_KS_WS
     ÕâÊÇ°´Ê××ֱʻ­À´ÅÅÐò¡£


Ïà¹ØÎĵµ£º

Pro*C ÖÐǶÈëpl/sql¿é

/* °üº¬CÍ·Îļþ */
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
/* °üº¬SQLCAÍ·Îļþ */
EXEC SQL INCLUDE sqlca;
EXEC SQL INCLUDE sqlda;
int main()
{
    EXEC SQL BEGIN DECLARE SECTION;
    int  money;
    ......

SQL²Ù×÷È«¼¯

ת×ÔCSDNÂÛ̳£ºchaihuoniu
ÏÂÁÐÓï¾ä²¿·ÖÊÇMssqlÓï¾ä£¬²»¿ÉÒÔÔÚaccessÖÐʹÓá£
SQL·ÖÀࣺ
DDL—Êý¾Ý¶¨ÒåÓïÑÔ(CREATE£¬ALTER£¬DROP£¬DECLARE)
DML—Êý¾Ý²Ù×ÝÓïÑÔ(SELECT£¬DELETE£¬UPDATE£¬INSERT)
DCL—Êý¾Ý¿ØÖÆÓïÑÔ(GRANT£¬REVOKE£¬COMMIT£¬ROLLBACK)
Ê×ÏÈ,¼òÒª½éÉÜ»ù´¡Óï¾ä£º
1¡¢ËµÃ÷£º´´½¨Êý¾ ......

SQLÓï·¨ÊÖ²á


 
 
SQLÓï·¨ÊÖ²á
Select
ÓÃ;£º
 ´ÓÖ¸¶¨±íÖÐÈ¡³öÖ¸¶¨µÄÁеÄÊý¾Ý
Óï·¨£º
 
SELECT column_name(s) from table_name
 
½âÊÍ£º
´ÓÊý¾Ý¿âÖÐÑ¡È¡×ÊÁÏÁУ¬²¢ÔÊÐí´ÓÒ»»ò¶à¸ö×ÊÁϱíÖУ¬Ñ¡È¡Ò»»ò¶à¸ö×ÊÁÏÁлò×ÊÁÏÐС£SELECT ³ÂÊöʽµÄÍêÕûÓï·¨Ï൱¸´ÔÓ£¬µ«Ö÷Òª×Ó¾ä¿ÉժҪΪ£º
SELECT select_ ......

join ºÍ UnionºÍSQL Union All µÄÇø±ð


SQL UNION ²Ù×÷·û
UNION ²Ù×÷·ûÓÃÓںϲ¢Á½¸ö»ò¶à¸ö SELECT Óï¾äµÄ½á¹û¼¯¡£
Çë×¢Ò⣬UNION ÄÚ²¿µÄ SELECT Óï¾ä±ØÐëÓµÓÐÏàͬÊýÁ¿µÄÁС£ÁÐÒ²±ØÐëÓµÓÐÏàËƵÄÊý¾ÝÀàÐÍ¡£Í¬Ê±£¬Ã¿Ìõ SELECT Óï¾äÖеÄÁеÄ˳Ðò±ØÐëÏàͬ¡£
SQL UNION Óï·¨
SELECT column_name(s) from table_name1
UNION
SELECT column_name(s) from table_na ......

SQLÓï¾ä


Êý¾Ý¶¨ÒåÓïÑÔ£¨DDL£©£º
    1£©´´½¨Êý¾Ý¿â£¨create£©£ºcreate database database-name;
           eg. create database test;
    2£©É¾³ýÊý¾Ý¿â£ºdrop database dbname;
       & ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØͼ | ¸ÓICP±¸09004571ºÅ