杞笘錛?span style="font-weight: normal">http://www.cnblogs.com/cime63/archive/2008/06/19/1225134.html錛?/span>
鍓嶄竴闃靛仛浜嗕釜浼氬憳緋葷粺,鍙堝啓浜嗕釜紼嬪簭鎶婁互寰鐨勪細鍛樻暟鎹鍏ュ埌SQL鏁版嵁搴撲腑.鍥犱負鏌愪簺鍘熷洜瀵間簡濂藉嚑閬?閫犳垚浜嗘煇浜涢噸澶嶇殑璁板綍瀛樺湪.鍓嶄袱澶╀嬌鐢ㄤ漢鍛樻墠鍙戠幇闂,浜庢槸鎯沖姙娉曡В鍐?
鎼滃晩鎼?鎼滃埌浜嗕嬌鐢⊿QL鍙ュ瓙鍒犻櫎閲嶅璁板綍鐨勬柟娉?鍙堜竴嬈′綋浼氬埌浜哠QL鐨勫己澶?鍏跺疄鏄垜鐨凷QL姘村鉤澶彍浜嗚屽凡).鍐欎笅鏉?鍔犲己璁板繂.
浼氬憳鏁版嵁闇瑕佺敤鍒扮殑鏄笅闈笁涓瓧孌?ID(鑷),MemberName,MemberAddress.鍙浼氬憳濮撳悕涓庝細鍛樺湴鍧鐩稿悓灝辮涓烘槸閲嶅璁板綍,閲嶅璁板綍鍦ㄥ垹闄ゆ椂鍙繚鐣橧D鏈澶х殑閭ｄ釜.SQL濡備笅:
delete MemberInfo where ID not in (
select max(ID) from MemberInfo group by MemberName, MemberAddress)
not in鐨勬晥鐜囧彲鑳戒細浣庝簺,浣嗗洜涓烘槸鐩存帴鎿嶄綔鏁版嵁搴?鎵浠ヨ繖騫朵笉閲嶈.榪欎釜鍙ュ瓙榪樻槸闈炲父鐨勭畝鍗曟湁鏁堢殑.
鍦ㄧ湡姝ｇ殑鍒犻櫎鎿嶄綔鍓?閫氬父浼氬厛浜嗚В涓涓嬮噸澶嶈褰曠殑鎯呭喌.鍙互浣跨敤涓嬮潰鐨勫彞瀛?
SELECT COUNT(MemberName) AS TheCount, MemberName, MemberAddress
FROM MemberInfo
GROUP BY MemberName, MemberAddress
HAVING (COUNT(*) > 1)
鍥犱負宸ヤ綔涓敤鐨凷QL澶畝鍗?浠ヨ嚦浜巊roup by鍙奾aving鐨勭敤娉曢兘涓嶄簡瑙?鐪熸槸鎯劎.
P.S. 鎵鏈夌殑鍐呭閮芥潵鑷簬緗戠粶,娌℃湁浠涔堢嫭鍒涚殑涓滆タ.鍙戝嚭鏉ュ彧鏄負浜嗗姞寮轟竴涓嬭嚜宸辯殑璁板繂.
鎼滃晩鎼?鎼滃埌浜嗕嬌鐢⊿QL鍙ュ瓙鍒犻櫎閲嶅璁板綍鐨勬柟娉?鍙堜竴嬈′綋浼氬埌浜哠QL鐨勫己澶?鍏跺疄鏄垜鐨凷QL姘村鉤澶彍浜嗚屽凡).鍐欎笅鏉?鍔犲己璁板繂.
浼氬憳鏁版嵁闇瑕佺敤鍒扮殑鏄笅闈笁涓瓧孌?ID(鑷),MemberName,MemberAddress.鍙浼氬憳濮撳悕涓庝細鍛樺湴鍧鐩稿悓灝辮涓烘槸閲嶅璁板綍,閲嶅璁板綍鍦ㄥ垹闄ゆ椂鍙繚鐣橧D鏈澶х殑閭ｄ釜.SQL濡備笅:
delete MemberInfo where ID not in ( select max(ID) from MemberInfo group by MemberName, MemberAddress)鍦ㄧ湡姝ｇ殑鍒犻櫎鎿嶄綔鍓?閫氬父浼氬厛浜嗚В涓涓嬮噸澶嶈褰曠殑鎯呭喌.鍙互浣跨敤涓嬮潰鐨勫彞瀛?
SELECT COUNT(MemberName) AS TheCount, MemberName, MemberAddressFROM MemberInfoGROUP BY MemberName, MemberAddressHAVING (COUNT(*) > 1)P.S. 鎵鏈夌殑鍐呭閮芥潵鑷簬緗戠粶,娌℃湁浠涔堢嫭鍒涚殑涓滆タ.鍙戝嚭鏉ュ彧鏄負浜嗗姞寮轟竴涓嬭嚜宸辯殑璁板繂.
]]>
1.鍑嗗宸ヤ綔: 鍑嗗鐩稿叧鐨勮蔣浠?Eclipse闄ゅ,寮婧愯蔣浠跺彲浠ヤ粠瀹樼綉涓嬭澆)
<1> .Microsoft SQL Server 2005 Express Edition
涓嬭澆鍦板潃:http://download.microsoft.com/download/0/9/0/09020fab-d2c3-4a8c-b9e0-db53a7a30ae8/SQLEXPR_CHS.EXE
<2> .SQL Server Management Studio
涓嬭澆鍦板潃:http://www.microsoft.com/downloads/details.aspx?displaylang=zh-cn&FamilyID=c243a5ae-4bd1-4e3d-94b8-5a0f62bf7796#filelist
<3> .SQL Server 2005 driver for JDBC
涓嬭澆鍦板潃:http://download.microsoft.com/download/8/B/D/8BDABAE2-B6EA-41D4-B903-7916EF3690EF/sqljdbc_1.2.2323.101_enu.exe
2.閮戒笅杞藉畬涔嬪悗寮濮嬭繘琛屽畨瑁? ,鍓嶄袱涓槸灞炰簬鏁版嵁搴撹蔣浠?姝ｅ父瀹夎鍗沖彲(娉ㄦ剰鏁版嵁搴撶櫥闄嗕笉瑕佷嬌鐢╳indows楠岃瘉)
<1> 灝咼DBC瑙ｅ帇緙╁埌浠繪剰浣嶇疆,姣斿瑙ｅ帇鍒癈鐩榩rogram files涓嬮潰,騫跺湪瀹夎鐩綍閲屾壘鍒皊qljdbc.jar鏂囦歡,寰楀埌鍏惰礬寰勫紑濮嬮厤緗幆澧冨彉閲?nbsp;
鍦ㄧ幆澧冨彉閲廲lasspath 鍚庨潰榪藉姞 C:"Program Files"Microsoft SQL Server2005 JDBC Driver"sqljdbc_1.2"enu"sqljdbc.jar
<2> 璁劇疆SQLEXPRESS鏈嶅姟鍣?
a.鎵撳紑SQL Server Configuration Manager -> SQLEXPRESS鐨勫崗璁? -> TCP/IP
b.鍙抽敭鍗曞嚮鍚姩TCP/IP
c.鍙屽嚮榪涘叆灞炴?鎶奍P鍦板潃涓殑IP all涓殑TCP绔彛璁劇疆涓?433
d.閲嶆柊鍚姩SQL Server 2005鏈嶅姟涓殑SQLEXPRESS鏈嶅姟鍣?nbsp;
e.鍏抽棴SQL Server Configuration Manager
<3> 鎵撳紑鍒氬垰瀹夎濂界殑 SQL Server Management Studio,榪炴帴SQLEXPRESS鏈嶅姟鍣? 鏂板緩鏁版嵁搴?璧峰悕瀛椾負sample
<4> 鎵撳紑Eclipse
a.鏂板緩宸ョ▼-> java -> Java project,璧峰悕涓篢est
b.閫夋嫨eclipse-> 紿楀彛-> 棣栭夐」-> Java-> installed JRE 緙栬緫宸茬粡瀹夎濂界殑jdk,鏌ユ壘鐩綍娣誨姞sqljdbc.jar
c.鍙抽敭鍗曞嚮鐩綍紿楀彛涓殑Test, 閫夋嫨Build Path -> Configure Build Path..., 娣誨姞鎵╁睍jar鏂囦歡,鍗蟲妸sqljdbc.jar娣誨姞鍒板叾涓?nbsp;
<5> 緙栧啓Java浠ｇ爜鏉ユ祴璇曡繛鎺ユ暟鎹簱
1 import Java.sql.*;
2 public class Test {
3 public static void main(String[] srg) {
4 String driverName = "com.microsoft.sqlserver.jdbc.SQLServerDriver "; //鍔犺澆JDBC椹卞姩
5 String dbURL = "jdbc:sqlserver://localhost:1433; DatabaseName=sample "; //榪炴帴鏈嶅姟鍣ㄥ拰鏁版嵁搴搒ample
6 String userName = "sa "; //榛樿鐢ㄦ埛鍚?nbsp;
7 String userPwd = "123456 "; //瀵嗙爜
8 Connection dbConn;
9
10 try {
11 Class.forName(driverName);
12 dbConn = DriverManager.getConnection(dbURL, userName, userPwd);
13 System.out.println( "Connection Successful! "); //濡傛灉榪炴帴鎴愬姛 鎺у埗鍙拌緭鍑篊onnection Successful!
14 } catch (Exception e) {
15 e.printStackTrace();
16 }
17 }
18 }
19
2 public class Test {
3 public static void main(String[] srg) {
4 String driverName = "com.microsoft.sqlserver.jdbc.SQLServerDriver "; //鍔犺澆JDBC椹卞姩
5 String dbURL = "jdbc:sqlserver://localhost:1433; DatabaseName=sample "; //榪炴帴鏈嶅姟鍣ㄥ拰鏁版嵁搴搒ample
6 String userName = "sa "; //榛樿鐢ㄦ埛鍚?nbsp;
7 String userPwd = "123456 "; //瀵嗙爜
8 Connection dbConn;
9
10 try {
11 Class.forName(driverName);
12 dbConn = DriverManager.getConnection(dbURL, userName, userPwd);
13 System.out.println( "Connection Successful! "); //濡傛灉榪炴帴鎴愬姛 鎺у埗鍙拌緭鍑篊onnection Successful!
14 } catch (Exception e) {
15 e.printStackTrace();
16 }
17 }
18 }
19
娉?
1.鍥犱負SQLexpress鏈嶅姟鍣ㄩ粯璁ゆ槸紱佺敤鐨勫茍涓旂鍙ｅ彿娌℃湁閰嶇疆,鎵浠ヨ榪涜閲嶆柊璁劇疆
2.濡傛灉浣犱互鍓嶇敤Java榪炴帴SQL Server 2000鐨勮瘽灝辮娉ㄦ剰浜?
鍦⊿QL Server 2000 涓姞杞介┍鍔ㄥ拰URL璺緞鐨勮鍙ユ槸
String driverName = "com.microsoft.jdbc.sqlserver.SQLServerDriver ";
String dbURL = "jdbc:microsoft:sqlserver://localhost:1433; DatabaseName=sample ";
鑰孲QL Server 2005 涓姞杞介┍鍔ㄥ拰url鐨勮鍙ュ垯涓?nbsp;
String driverName = "com.microsoft.sqlserver.jdbc.SQLServerDriver ";
String dbURL = "jdbc:sqlserver://localhost:1433; DatabaseName=sample ";
濡傛灉鍐欐硶閿欒灝嗕細鎵句笉鍒伴┍鍔?
]]>