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SqlServer

在SQL Server中通過SQL語句實(shí)現(xiàn)分頁查詢

在SQLServer中通過SQL語句實(shí)現(xiàn)分頁查詢2008年01月06日星期日12:28建立表:CREATETABLE[TestTable]([ID][int]IDENTITY(1,1)NOTNULL,[FirstName][nvarchar](100)COLLATEChinese_PRC_CI_ASNULL,[LastName][nvarchar](100)COLLATEChinese_PRC_CI_ASNULL,[Country][nvarchar](5

系統(tǒng) 2019-08-12 01:55:27 5342

SqlServer

Sql Server實(shí)現(xiàn)多行數(shù)據(jù)按分組用逗號(hào)分隔成一行

例如,要將下面的數(shù)據(jù)以GROUP_ID進(jìn)行分組,一組一行,一組中的多個(gè)PRODUCT_ID用逗號(hào)分隔,select出來成如下結(jié)果:在SqlServer中,我目前想到的一種方法是寫一個(gè)函數(shù),如下:CREATEFUNCTION[dbo].[FN_GetProductsByGroup](@GroupIdint)RETURNS[nvarchar](4000)ASBEGINDECLARE@ReturnValue[nvarchar](1000)SET@ReturnVa

系統(tǒng) 2019-08-12 01:32:05 5299

DB2

db2 統(tǒng)計(jì)信息 runstats

1.runstats的語法:runstatsontable[模式名].[表名]withdistributionanddetailedindexesall注意:你可以在所有列上,或者僅僅在某些列或列組(除了LONG和LOB列)上執(zhí)行RUNSTATS。如果沒有指定特定列的子句,系統(tǒng)則會(huì)使用默認(rèn)的ONALLCOLUMNS子句。使用RUNSTATSWITHDISTRIBUTION當(dāng)您已確定表中包含不是統(tǒng)一分布的數(shù)據(jù)時(shí),可以運(yùn)行包含WITHDISTRIBUTION子

系統(tǒng) 2019-08-12 01:54:04 5292

Oracle

ORACLE遷移GP實(shí)踐

最近在做oracle到greenplum的遷移實(shí)踐,步驟如下:1.使用ora2pg實(shí)現(xiàn)Oracle的數(shù)據(jù)結(jié)構(gòu)遷移到GP的實(shí)現(xiàn)過程2.Oracle的數(shù)據(jù)遷移到GP的實(shí)現(xiàn)過程1.ora2pg的使用地址:https://github.com/darold/ora2p關(guān)系圖如下:需要安裝DBD-oracle,DBD-pg,DBI模塊,配置conf后可以把oracle的數(shù)據(jù)結(jié)構(gòu)(table,view,package等)轉(zhuǎn)化成PG的數(shù)據(jù)結(jié)構(gòu).也可以配置直接把oracl

系統(tǒng) 2019-08-12 01:54:25 5221

SqlServer

C語言連接SQLSERVER數(shù)據(jù)庫(kù)

原文:C語言連接SQLSERVER數(shù)據(jù)庫(kù)第一步:配置ODBC。在配置ODBC時(shí)有用戶DSN、系統(tǒng)DSN、和文件DSN三種方法,為了穩(wěn)妥起見,采用系統(tǒng)DSN。DSN的名字叫LocalServer,帳號(hào):sa,密碼123456第二步:打開VC,建一個(gè)win32ConsoleApplication工程,名字隨便都可以;第三步:新建一個(gè)文件,文件名隨便都可以;第四步:拷貝如下代碼:#include#include#inclu

系統(tǒng) 2019-08-12 01:53:14 5197

數(shù)據(jù)庫(kù)相關(guān)

關(guān)于htons和htonl

我開始的時(shí)候認(rèn)為htons和htonl可以只用htonl代替但是后來發(fā)現(xiàn)這個(gè)是錯(cuò)誤,會(huì)導(dǎo)致服務(wù)器端和客戶端連接不上。下面就讓我們看看他們:htons#includeuint16_thtons(uint16_thostshort);htons的功能:將一個(gè)無符號(hào)短整型數(shù)值轉(zhuǎn)換為網(wǎng)絡(luò)字節(jié)序,即大端模式(big-endian)參數(shù)u_shorthostshort:16位無符號(hào)整數(shù)返回值:TCP/IP網(wǎng)絡(luò)字節(jié)順序.htons是把你機(jī)器上的

系統(tǒng) 2019-08-12 01:51:33 5150

Oracle

oracle 報(bào)錯(cuò) column ambiguously defined

columnambiguouslydefinedORA-00918:columnambiguouslydefinedjava.sql.SQLException:ORA-00918:columnambiguouslydefinedORA-00918:columnambiguouslydefined。中文名稱:未明確定義的列!可能定義了兩個(gè)相同的列你找找你后面的t里面是不是有兩個(gè)相同的列,我也是這個(gè)問題,就是多了一個(gè)相同的列的查詢,所以sb了..我出錯(cuò)的sql

系統(tǒng) 2019-08-12 01:52:25 5117

Oracle

11.25號(hào)------oracle smon大全很經(jīng)典

了解你所不知道的SMON功能(一):清理臨時(shí)段June7,2011ByMacleanLiu9CommentsSMON(systemmonitorprocess)系統(tǒng)監(jiān)控后臺(tái)進(jìn)程,有時(shí)候也被叫做systemcleanupprocess,這么叫的原因是它負(fù)責(zé)完成很多清理(cleanup)任務(wù)。但凡學(xué)習(xí)過Oracle基礎(chǔ)知識(shí)的技術(shù)人員都會(huì)或多或少對(duì)該backgroundprocess的功能有所了解。曾幾何時(shí)對(duì)SMON功能的了解程度可以作為評(píng)判一位DBA理論知識(shí)的

系統(tǒng) 2019-08-29 22:13:51 5116

MySql

_mysql_exceptions.OperationalError: (2006, '

ScrewedupMySQLinit_connect-DatabaseAdministratorsmax_allowed_packet=256Mmax_allowed_packet=1024M_mysql_exceptions.OperationalError:(2006,'MySQLserverhasgoneaway')

系統(tǒng) 2019-08-12 01:32:40 5103

Oracle

ORACLE使用數(shù)據(jù)泵導(dǎo)入導(dǎo)出部分表

1、導(dǎo)出名字為A的表(這里會(huì)導(dǎo)出SEQUENCES及FUNCTION等內(nèi)容)expdpTEST/TEST@orclschemas=TESTdumpfile=TEST.dmpDIRECTORY=db_bakEXCLUDE=TABLE:\"NOTIN\(\'A\')\"2、導(dǎo)出名字不為A的表(去掉NOT與我們習(xí)慣的正好相反)expdpTEST/TEST@orclschemas=TESTdumpfile=TEST.dmpDIRECTORY=db_bakEXCLU

系統(tǒng) 2019-08-12 01:55:40 5099

Oracle

Oracle對(duì)樹形結(jié)構(gòu)按級(jí)次排序SQL

1、自頂向下查找selectt.name,t.idfromtreetstartwitht.id='top'CONNECTBYPRIORt.id=t.parent_idorderSIBLINGSbyt.order_no2、自底向上查找selectt.name,t.idfromtreetstartwitht.id='top'CONNECTBYPRIORt.parent_id=t.idorderSIBLINGSbyt.order_noOracle對(duì)樹形結(jié)構(gòu)按級(jí)次

系統(tǒng) 2019-08-12 01:51:35 5059

Oracle

Oracle:varchar2、nvarchar2 字段類型的區(qū)別

一直對(duì)varchar2、nvarchar2字段類型存儲(chǔ)字符數(shù)不清楚,現(xiàn)測(cè)試如下:創(chuàng)建TT測(cè)試表測(cè)試腳本如下:insertintottvalues('1111','1111');-----okinsertintottvalues('wwww','wwww')-----okinsertintottvalues('應(yīng)用范圍','應(yīng)用范圍');-----失敗提示如下:insertintottvalues('應(yīng)用范圍','應(yīng)用');-----失敗提示如下:inser

系統(tǒng) 2019-08-12 01:55:06 5028

DB2

db2 查看表空間使用率

1.統(tǒng)計(jì)所有節(jié)點(diǎn)表空間使用率selectsubstr(TABLESPACE_NAME,1,20)asTBSPC_NAME,bigint(TOTAL_PAGES*PAGE_SIZE)/1024/1024as"TOTAL(MB)",used_pages*PAGE_SIZE/1024/1024as"USED(MB)",free_pages*PAGE_SIZE/1024/1024as"FREE(MB)"fromtable(snapshot_tbs_cfg('DB_

系統(tǒng) 2019-08-12 01:54:06 5018

主站蜘蛛池模板: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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