鍏崇郴鏁版嵁搴撶殑涓昏鐗圭偣涔嬩竴灝辨槸鐢ㄨ〃鐨勬柟寮忕粍緇囨暟鎹傝〃鏄?font size="3">SQL璇█瀛樻斁鏁版嵁銆佹煡鎵炬暟鎹互鍙?qiáng)鏇存柊鏁版嵁鐨勫熀鏈暟鎹l撴瀯銆傚湪SQL璇█涓紝琛ㄦ湁涓ユ牸鐨勫畾涔夛紝瀹冩槸涓縐嶄簩緇磋〃錛屽浜庤繖縐嶈〃鏈夊涓嬭瀹氾細(xì)
1)姣忎竴寮犺〃閮芥湁涓涓悕瀛楋紝閫氬父縐頒負(fù)琛ㄥ悕鎴栧叧緋誨悕銆傝〃鍚嶅繀欏諱互瀛楁瘝寮澶達(dá)紝鏈澶ч暱搴︿負(fù)30涓瓧絎︺?/font>
2)涓寮犺〃鍙互鐢辮嫢騫插垪緇勬垚錛屽垪鍚嶅敮涓錛屽垪鍚嶄篃縐頒綔灞炴у悕銆?/font>
3)琛ㄤ腑鐨勪竴琛岀О涓轟竴涓厓緇勶紝瀹冪浉褰撲簬涓鏉¤褰曘?/font>
4)鍚屼竴鍒楃殑鏁版嵁蹇呴』鍏鋒湁鐩稿悓鐨勬暟鎹被鍨嬨?/font>
5)琛ㄤ腑鐨勬瘡涓涓垪鍊煎繀欏繪槸涓嶅彲鍒嗗壊鐨勫熀鏈暟鎹」銆?/font>
CREATE TABLE
琛ㄥ悕 [琛ㄧ害鏉?/font>](
鍒楀悕1 鏁版嵁綾誨瀷 [緙虹渷鍊?錛屽垪綰︽潫1](
鍒楀悕2 鏁版嵁綾誨瀷 [緙虹渷鍊?錛屽垪綰︽潫2]…
鍒楀悕
n 鏁版嵁綾誨瀷 [緙虹渷鍊糿錛屽垪綰︽潫n][TABLESPACE
琛ㄧ┖闂村悕縐癩[STORAGE (
瀛樿串鐨勫瓙鍙ワ級(jí)][ENABLE
綰︽潫鍚?/font>][DISABLE
綰︽潫鍚?/font>]褰撲竴涓〃鏂板緩鎴愭椂錛屽畠閲岄潰娌℃湁鏁版嵁錛岄氳繃鍚戣〃涓墻鍏ユ暟鎹紝寤烘垚琛ㄧ殑瀹炰緥銆?/p>
璇彞鍙ユ硶錛?/font>
INSERT INTO
琛ㄥ悕[(鍒楀悕1,…)]VALUES(
鍊?/font>1錛屽?/font>2錛?#8230;,鍊糿)[
瀛愭煡璇?/font>]錛?/font> 鍋囪鏈変竴寮犺〃Student濡備笅鎵紺猴細(xì)| NO | NAME | AGE |
| 1001 | A | 12 |
| 1002 | B | 14 |
INSERT INTO STUDENT VALUSE(1003, 'E',12);銆
瀵硅〃涓凡鏈夋暟鎹繘琛屼慨鏀癸紝璇彞鍙ユ硶錛?/font>
UPDATE
琛ㄥ悕SET 鍒楀悕1錛濊〃杈懼紡1錛屽垪鍚?/font>2錛濊〃杈懼紡2錛?#8230;WHERE
鏉′歡錛?/p>渚嬪錛?font size="3">瀵逛笅琛⊿tudent
| NO | NAME | AGE |
| 1001 | A | 12 |
| 1002 | B | 14 |
灝?/font>B鐨勫勾綰敼涓?8錛涘簲璇ユ墽琛屼互涓嬭鍙ワ細(xì)
UPDATE STUDENT SET AGE=18 WHERE NAME='B';
鍒犻櫎琛ㄤ腑宸叉湁鏁版嵁錛屼笉鑳藉垹闄や笉瀛樺湪鐨勬暟鎹?/font>
璇彞鍙ユ硶:
DELETE FROM 琛ㄥ悕 WHERE 鏉′歡錛?br />
渚嬪錛?br />
瀵逛笅闈tudent琛ㄨ繘琛屽垹闄わ紝瑕佸垹闄ゅ叾涓勾綰負(fù)12鐨勫鐢燂紱
| NO | NAME | AGE |
| 1001 | A | 12 |
| 1002 | B | 14 |
DELETE FROM STUDENT WHERE AGE錛?/font>12錛?br />
ALTER TABLE
琛ㄥ悕 ADD(鏂板垪鍚?鏁版嵁綾誨瀷(闀垮害))錛?/p>渚嬪錛?/font>
ALTER TABLE STUDENT ADD (DEPARTMENT CHAR(8));
b.
澧炲姞宸叉湁鍒楃殑鏁版嵁綾誨瀷銆?/p>渚嬪錛?/p>
ALTER TABLE STUDENT MODIFY(NAME VARCHAR2(25));
灝嗗凡緇忓瓨鍦ㄧ殑琛ㄥ垹闄わ紝璇彞鍙ユ硶:
DROP TABLE
琛ㄥ悕錛?/p>渚嬪錛?/font>
DROP TABLE EMP
錛?/font> 鏌ヨ璇彞SELECT
鍛戒護(hù)鐨勮娉曚負(fù)錛?/font>SELECT [DISTINCT|ALL] {*|
妯″紡鍚?/font>.] {琛ㄥ悕|瑙嗗浘鍚?/font>|蹇収鍚?font size="3">] .*
…| {琛ㄨ揪寮?font size="3">[鍒楀埆鍚?font size="3">]…} } [, [妯″紡鍚?font size="3">. ] {琛ㄥ悕|瑙嗗浘鍚?/font>|} .*…| 琛ㄨ揪寮?/font>[鍒楀埆鍚?/font>] ]…
FROM [妯″紡鍚?] {琛ㄥ悕|瑙嗗浘鍚峾蹇収鍚峿 [@鏁版嵁搴撻摼鍚峕 [琛ㄥ埆鍚峕
[, [妯″紡鍚?/font>.] {琛ㄥ悕|瑙嗗浘鍚?/font>|蹇収鍚峿 [@鏁版嵁搴撻摼鍚?/font>]
[
琛ㄥ埆鍚?/font>] ]…[WHERE
鏉′歡][START WITH
鏉′歡 CONNECT BY 鏉′歡][GROUP BY
琛ㄨ揪寮?/font>[錛岃〃杈懼紡] …[HAVING鏉′歡][UNION|UNION ALL |INTERSECT|MINUS]SELECT
鍛戒護(hù)[ORDER BY{
琛ㄨ揪寮?/font>|浣嶇疆} [ASC|DESC] [, {琛ㄨ揪寮?/font>|浣嶇疆[ASC|DESC]}]…] 渚嬪錛氬浜嶴TUDENT琛?| NO | NAME | AGE |
| 1001 | AE | 12 |
| 1002 | BT | 14 |
(1) 鏌ヨ騫寸邯涓?2鐨勫鐢熷鍚嶏紱
SELECT STUDENT.NAME FROM STUDENT WHERE AGE=12;
(2) 鏌ヨ騫寸邯鍦?2鑷?6宀佷箣闂寸殑瀛︾敓濮撳悕錛?/p>
SELECT STUDENT.NAME FROM STUDENT WHERE AGE BETWEEN 12 AND 16;
(3) 鏌ヨ騫寸邯涓?/strong>鍦?2鑷?6宀佷箣闂寸殑瀛︾敓濮撳悕錛?/p>
SELECT STUDENT.NAME FROM STUDENT WHERE AGE NOT BETWEEN 12 AND 16; (4) 鏌ヨ鎵鏈夊鍚嶄互A寮澶寸殑瀛︾敓鐨勫鍚嶏紱 SELECT STUDENT.NAME FROM STUDENT WHERE NAME LIKE 'A%'; (5) 鍒楀嚭鎵鏈夊鐢熷勾綰殑鍜岋紝騫寸邯鐨勫鉤鍧囧鹼紝鏈澶у鹼紝鏈灝忓鹼紝鏈澶у間笌鏈灝忓間箣闂寸殑宸鹼紱 SELECT AVG(AGE), SUM(AGE), MAX(AGE), MIN(AGE), MAX(AGE)-MIN(AGE); (6) 灝嗘墍鏈夊鐢熸寜瀛﹀彿欏哄簭鍗囧簭鎺掑垪錛?/font> SELECT * FROM STUDENT ORDER BY NO DESC; (7) 灝嗘墍鏈夊鐢熸寜瀛﹀彿欏哄簭鍗囧簭鎺掑垪錛?/font> SELECT * FROM STUDENT ORDER BY NO ASC;
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