1. ORACLE
Select * FROM TABLE1 Where ROWNUM<=N
2. INFORMIX
Select FIRST N * FROM TABLE1 where 1=1
3. MYSQL
Select * FROM TABLE1 where 1=1 LIMIT N
(浠ヤ笂涓夌鏄亢宸ヤ綔涓敤鍒扮殑鏁版嵁搴?
4. DB2
Select * ROW_NUMBER() OVER(ORDER BY COL1 DESC) AS ROWNUM Where ROWNUM<=N
鎴栬?br />
Select COLUMN FROM TABLE where 1=1 FETCH FIRST N ROWS ONLY
5. SQL SERVER
Select TOP N * FROM TABLE1 where 1=1
or
SET ROWCOUNT N Select * FROM TABLE1 where 1=1 SET ROWCOUNT N1
6. SYBASE
SET ROWCOUNT N Select * FROM TABLE1 where 1=1 SET ROWCOUNT N1
7. FOXPRO
Select * TOP N FROM TABLE orDER BY COLUMN
8. ACCESS
Select TOP N * FROM TABLE1 where 1=1
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鍦ㄦ帶鍒朵腑蹇冪殑瀵硅薄瑙嗗浘紿楀彛涓紝閫夋嫨鎵瑕佸鍑鴻〃緇撴瀯鐨勬暟鎹〃錛屾寜浣?/span>Ctrl鎴?/span>Shift鍙閫夛紝鍗曞嚮榧犳爣鍙抽敭錛岄夋嫨錛?/span>>鐢熸垚DDL鍗沖彲銆?/span>
鏂規(guī)硶浜?/span>
絎竴姝ワ細(xì)鎵撳紑DB2鐨勫懡浠よ宸ュ叿錛屽湪DB2瀹夎鐩綍鐨?/span>BIN鏂囦歡澶逛笅鏂板緩涓涓枃浠跺すdata錛屽茍涓旇繘鍏ヨ鐩綍銆?/span>
鍒涘緩璇ョ洰褰曪細(xì) mkdir data
榪涘叆璇ョ洰褰曪細(xì) cd data
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絎簩姝ワ細(xì)瀵煎嚭琛ㄧ粨鏋勶紝鍛戒護(hù)琛屽涓嬶細(xì)
db2look -d dbname -e -a -x -i username -w password -o ddlfile.sql
鎵ц鎴愬姛涔嬪悗錛屼綘浼?xì)鍦ㄥ垰鎵嶆柊寰忕殑鏂囦欢澶逛笅鎵惧埌璇?/span>sql鏂囦歡銆?/span>
絎笁姝ワ細(xì)瀵煎嚭鏁版嵁錛屽懡浠よ濡備笅錛?/span>
db2move databasename export -u username -p password
鑷蟲錛屽鍑烘暟鎹粨鏉熴?/span>
2瀵煎嚭琛ㄤ腑鏁版嵁
export to [path(渚?/span>:D:"TABLE1.ixf)] of ixf select [瀛楁(渚?/span>: * or col1,col2,col3)] from TABLE1;
export to [path(渚?/span>:D:"TABLE1.del)] of del select [瀛楁(渚?/span>: * or col1,col2,col3)] from TABLE1;
瀵煎叆琛ㄧ殑鏁版嵁
import from [path(渚?/span>:D:"TABLE1.ixf)] of ixf insert into TABLE1;
load from [path(渚?/span>:D:"TABLE1.ixf)] of ixf insert into TABLE1;
load from [path(渚?/span>:D:"TABLE1.ixf)] of ixf replace into TABLE1; // 瑁呭叆鏁版嵁鍓嶏紝鍏堝垹闄ゅ凡瀛樺湪璁板綍
load from [path(渚?/span>:D:"TABLE1.ixf)] of ixf restart into TABLE1; // 褰撹鍏ュけ璐ユ椂錛岄噸鏂版墽琛岋紝騫惰褰曞鍑虹粨鏋滃拰閿欒淇℃伅
import from [path(渚?/span>:D:"TABLE1.ixf)] of ixf savecount 1000 messages [path(渚?/span>:D:"msg.txt)] insert into TABLE1;// 鍏朵腑錛?/span>savecount琛ㄧず瀹屾垚姣?/span>1000鏉℃搷浣滐紝璁板綍涓嬈?/span>.
瀛樺湪鑷闀垮瓧孌電殑鏁版嵁瀵煎叆錛?/span>
load from [path(渚?/span>:D:"TABLE1.ixf)] of ixf modified by identityignore insert into TABLE1;// 鍔犲叆modified by identityignore.
瑙ｉ櫎瑁呭叆鏁版嵁鏃訛紝鍙戠敓鐨勬鏌ユ寕璧?/span>.
SET INTEGRITY FOR TABLE1 CHECK IMMEDIATE UNCHECKED;
鍛戒護(hù)鍙鏁版嵁閫氳繃綰︽潫媯(gè)鏌ョ殑琛ㄦ湁鏁堬紝濡傛灉鎵ц榪樹笉鑳借В闄わ紝鏈夊繀瑕佹鏌ユ暟鎹殑瀹屾暣鎬э紝鏄惁涓嶇鍚堢害鏉熸潯浠訛紝騫惰瘯鍥鵑噸鏂版暣鐞嗘暟鎹紝鍐嶆墽琛岃鍏ユ搷浣?/span>.
鍙﹀錛屽load鍜?/span>import錛屽瓧闈笂鐨勫尯鍒槸:瑁呭叆鍜屽鍏ワ紝浣嗕粛鏈悊瑙ｄ袱鑰呬箣闂寸殑鍖哄埆.
鍙槸鎬ц兘涓?/span>load鏄劇劧浼樹簬import.錛?/span>load 闇瑕佹洿澶氱殑鏉冮檺錛?/span>
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