SQLµÝ¹é²éѯÊý¾Ý
Tree±íÈçÏÂ:
NodeId ParentId NodeName
0 -1 Ò»
1 0 ¶þ
9 1 Èý
10 9 ËÄ
12 10 Îå
18 1 Áù
ÒÑÖª£ºNodeid Äܵõ½ NodeName µÄµÝ¹éÁ¬½Ó×Ö·û´®Âð£¿
Àý£º ÒÑÖª ½á¹û
NodeId:10 ËÄÈý¶þÒ»
NodeId:18 Áù¶þÒ»
NodeId:1 ¶þÒ»
½â¾ö·½·¨£º
1¡¢´´½¨±í½á¹¹¡£
³ÌÐò´úÂë
create table Tree(NodeId int,Paren
Ïà¹ØÎĵµ£º
create database test --½¨Á¢testÊý¾Ý¿â
use test
create table BONUS --½¨Á¢
(
ENAME NVARCHAR(10),
JOB NVARCHAR(9),
SAL FLOAT,
COMM FLOAT
)
create table DEPT --½¨Á¢²¿Ãűí
(
DEPTNO SMALLINT not null, --²¿ÃűàºÅ
DNAME NVARCHAR(14), --²¿ÃÅÃû
LOC NVARC ......
±íÖÐÖ÷¼ü±ØÐëΪ±êʶÁУ¬[ID] int IDENTITY (1,1)
1.·ÖÒ³·½°¸Ò»£º(ÀûÓÃNot InºÍSELECT TOP·ÖÒ³)
Óï¾äÐÎʽ£º
SELECT TOP Ò³¼Ç¼ÊýÁ¿ *
from ±íÃû
WHERE (ID NOT IN
(SELECT TOP (ÿҳÐÐÊý*(Ò³Êý-1)) ID
from ±íÃû
ORDER BY ID))
ORDER BY ID
//×Ô¼º»¹¿ÉÒÔ¼ÓÉÏһЩ²é ......
AspNetPagerÊÇÒ»¸ö±È½ÏºÃµÄ·ÖÒ³¿Ø¼þ,¸Ã¿Ø¼þʹÓùý³Ì·Öҳʮ·Ö·½±ã,¹ý³ÌÈçÏÂ:
Create PROCEDURE [dbo].[pt_AspNetPager]
(
@tableName varchar(255), -- ±íÃû
@fieldName varchar(400)= '*', -- ×Ö¶ÎÃû
@strWhere varchar(255) = Null,
@fieldOrder varchar(100), --²»ÄÜΪ¿Õ
@startIndex int ......
Ô¶³ÌÁ¬½Ósql server 2000·þÎñÆ÷µÄ½â¾ö·½°¸
----ת×Ô£º·ÉºüСÎÝ
ÓÉÓ ......
Äãд¹ýÒ»ÌõsqlÓï¾äÀ´ÐÞ¸ÄÁ½¸ö±íµÄÊý¾ÝÂð£¿
UPDATE test.table1 t1,test.table2 t2 SET t1.aa='a',t1.bb='b',t2.cc='c',WHERE t1.u_id=t2.u_id AND t1.u_id='1' £»
table1µÄu_idºÍtable2µÄu_idÊÇÖ÷Íâ¼ü¹Øϵ ......