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             'À©µµ¿ì µðÆæ´õ ²ô±â'

2. Å©·Ò ºê¶ó¿ìÀú·Î Á¢¼Ó½Ã ³ª¿À´Â ¾Ç¼ºÄÚµå °æ°íâÀº ±¸±Û Å©·ÒÀÇ ¿¡·¯, Áï ¿ÀŽ(ŽÁö ¿À·ù)À̹ǷΠ¹«½ÃÇÏ½Ã¸é µË´Ï´Ù.

3. ÀÌ »çÀÌÆ®´Â ¾ÈÀüÇÏ¸ç ±ú²ýÇÏ´Ù´Â °ÍÀ» ¾Ë·Á µå¸³´Ï´Ù.

4. ¹«°íÇÑ »çÀÌÆ®µé¿¡ ´ëÇÑ °ø·æ ±â¾÷ ºê¶ó¿ìÀúµéÀÇ ¹«Â÷º°ÀûÀÎ 'ŽÁö ¿À·ù ȾÆ÷'°¡ »ç¿ëÀÚµéÀÇ Á¤º¸ °øÀ¯ÀÇ ÀÚÀ¯¸¦ ħÇØÇÏ°í ÀÖ½À´Ï´Ù. ÀÌ¿¡ ´ëÀÀÇÏ¿© ÀÌ ±â¾÷µéÀ» »ó´ë·Î ¼Ò¼ÛÀ» ÁغñÇÏ°í ÀÖ½À´Ï´Ù.

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MYSQL ÆÁ
À̸§: ÇØÄ¿Áî´º½º
MYSQL ¸í·É¾î ±âÃÊ  
SQL¹® ±âº»

µ¥ÀÌŸº£À̽º¿¡¼­ µ¥ÀÌŸ¸¦ ÁúÀÇÇÑ´Ù.(Select)

µ¥ÀÌŸ¸¦ ÀÔ·Â(Insert), ¼öÁ¤(Update), »èÁ¦(Delete)ÇÑ´Ù.

µ¥ÀÌŸ ±¸Á¶¸¦ »ý¼º(Create), ¼öÁ¤(Alter), »èÁ¦(Drop)ÇÑ´Ùµ¥ÀÌŸ ¾×¼¼½º¸¦ Á¶ÀýÇÑ´Ù(Grant)



SQL¹®ÀÇ Á¾·ù

SQL¹®ÀÇ Á¾·ù¿¡´Â

  DCL(Data Controll LanguageÅ×À̺í/µ¥ÀÌŸÀÇ ±¸Á¶¸¦ Á¦¾îÇÏ´Â ¸í·É) // µ¥ÀÌÅÍ Á¦¾î¾î

DDL(Data Definition LanguageÅ×À̺í/µ¥ÀÌŸÀÇ ±¸Á¶¸¦ Á¶ÀÛÇÏ´Â ¸í·É) // µ¥ÀÌÅÍ Á¤ÀǾî

DML(Data Manupulation Language : µ¥ÀÌŸ¸¦ Á¶ÀÛÇÏ´Â ¸í·É) // µ¥ÀÌÅÍ Á¶ÀÛ¾î

Session Control(¼¼¼ÇÀ» Á¦¾îÇÏ´Â ¸í·É)

System Control(½Ã½ºÅÛÀ» Á¦¾îÇÏ´Â ¸í·É)

Transaction Control(Æ®·£Àè¼ÇÀ» Á¦¾îÇÏ´Â ¸í·É)

µîÀÌ ÀÖ´Ù. (¾Æ·¡ Ç¥ Âü°í)

Data Definition Data Manupulation System Control
ALTER
ANALYZE
AUDIT
COMMENT
CREATE
DROP
GRANT
NOAUDIT
RENAME
REVOKE
TRUNCATE DELETE
EXPLAIN PLAN
INSERT
LOCK TABLE
SELECT
UPDATE ALTER SYSTEM
Transaction Control
COMMIT
ROLLBACK
SAVEPOINT
SET TRANSACTION
Session Control
ALTER SESSION
SET ROLE



ALTER : µ¥ÀÌŸº£À̽º¸¦ º¯°æÇÒ ¶§ »ç¿ë.

ANALYZE : µ¥ÀÌŸº£À̽ºÀÇ Åë°èÀڷḦ »ý¼º½Ã¿¡ »ç¿ë.

AUDIT: SQL¹®À» auditingÇϱâ À§ÇØ ÁöÁ¤ÇÏ´Â ¸í·É.

COMMENT : table, view, snapshot ¶Ç´Â column¿¡ °üÇÑ comment¸¦ µ¥ÀÌÅÍ µñ¼Å³Ê¸®¿¡ÀÔ·ÂÇÒ ¶§ »ç¿ë.

CREATE : table, index, view, snapshot, cluster, database, database link µî°ú °°Àº database object¸¦ »ý¼º½Ã¿¡ »ç¿ë.

DROP : database object»èÁ¦ÇÏ´Â ¸í·É.

RENAME : table, view, sequence, private synonymÀÇ À̸§À» º¯°æÇÏ´Â ¸í·É.

NOAUDIT : AUDIT¿¡ ÀÇÇØ ¼±ÅÃµÈ SQL¹®ÀÇ audit¸¦ Á¤Áö½ÃÅ°´Â ¸í·É.

REVOKE : objectÀÇ ±ÇÇÑÀ» Ãë¼ÒÇÏ´Â ¸í·É.

TRUNCATE : Å×À̺íÀ̳ª clusterÀÇ ¸ðµç row¸¦ »èÁ¦ÇÏ´Â ¸í·É.

DELETE : Å×À̺íÀ̳ª viewÀÇ baseÅ×À̺íÀÇ row¸¦ »èÁ¦ÇÏ´Â ¸í·É.

EXPLAIN PLAN : SQL¹®ÀÇ ½ÇÇà°èȹÀ» °áÁ¤ÇÏ´Â ¸í·É.

INSERT : Å×À̺í, VIEWÀÇ BASEÅ×ÀÌºí¿¡ ROW¸¦ Ãß°¡ÇÏ´Â ¸í·É.

LOCK TABLE : 1°³ ¶Ç´Â ¿©·¯ °³ÀÇ Å×À̺íÀ» LOCKÇÏ´Â ¸í·É.

SELECT : Å×À̺í, VIEW, SNAPSHOT¿¡¼­ ROW¸¦ ±¸ÇØ¿À´Â ¸í·É.

UPDATE : TABLE, VIEWÀÇ BASE TABLEÀÇ Á¸ÀçÇÏ´Â ROWÀÇ °ªÀ» º¯°æÇÏ´Â ¸í·É.

ALTER SESSION : À¯Àú°¡ ±ÇÇÑÀÌ ÀÖ´Â ¼¼¼ÇÀ» Á¦¾îÇÏ´Â ¸í·É.

SET ROLE : ÇöÀçÀÇ ¼¼¼ÇÀÇ ROLEÀ» ENABLE/DISABEL½ÃÅ°´Â ¸í·É.

ALTER SYSTEM : ¿À¶óŬ ÀνºÅϽº¸¦ º¯°æÇÏ´Â ¸í·É.

COMMIT : ÇöÀçÀÇ Æ®·£Àè¼ÇÀ» Á¾·áÇÏ°í, Æ®·£Àè¼Ç µµÁß º¯°æµÇ¾îÁø µ¥ÀÌŸ¸¦ È®Á¤ÇÏ´Â ¸í·É.

ROLLBACK : ÇöÀçÀÇ Æ®·£Àè¼ÇÀ» Ãë¼ÒÇÏ°í º¯°æµÇ¾îÁø µ¥ÀÌŸ¸¦ º¯°æÀüÀÇ µ¥ÀÌŸ·Î º¹±¸.

SAVEPOINT : Æ®·£Àè¼Ç¿¡¼­ ³ªÁß¿¡ ROLLBACKÇÒ À§Ä¡¸¦ ÁöÁ¤ÇÏ´Â ¸í·É.

SET TRANSACTION : ÇöÀçÀÇ Æ®·£Àè¼Ç¿¡¼­ Æ®·£Àè¼ÇÀ» READ-ONLY·Î Çϰųª READ-WRITE·Î ¼³Á¤, Æ®·£Àè¼Ç¿¡¼­ »ç¿ëµÉ ROLLBACK SEGMENT¸¦ ÁöÁ¤ÇÑ´Ù.


TIP> SQLPLUS¿¡¼­ HELP¸¦ º¸´Â ¹æ¹ý

SQL>HELP [¸í·É¾î]



±âº»ÀûÀÎ SQL¹®

SELECT ÇÑ°³ ȤÀº ¿©·Á°³ÀÇ Å×ÀÌºí¿¡¼­ ROW¸¦ ¸®ÅÏÇÑ´Ù.

INSERT Å×ÀÌºí¿¡ »õ·Î¿î ROW¸¦ Ãß°¡ÇÑ´Ù.

UPDATE Å×À̺íÀÇ ROW¸¦ ¼öÁ¤ÇÑ´Ù.

DELETE Å×ÀÌºí¿¡¼­ ROW¸¦ »èÁ¦ÇÑ´Ù.



´ÙÀ½ SQL¹®µéÀº Embeddec SQL¹®¿¡¼­ CURSOR¸¦ Á¤ÀÇÇÏ°í Á¶ÀÛÇϴµ¥ »ç¿ëµÈ´Ù.

DECLARE CURSOR¸¦ ¼±¾ðÇÑ´Ù.

ALLOCATE CURSORº¯¼ö¿¡ ¸Þ¸ð¸®¸¦ ÇÒ´çÇÑ´Ù.

OPEN QUERY¸¦ »ç¿ë°¡´ÉÇÏ°Ô ¼öÇàÇÏ¿© active setÀ» »ý¼ºÇÑ´Ù.

FETCH active set¿¡¼­ °¢ ROW¸¦ °¡Á®¿Â´Ù.

CLOSE CURSOR¸¦ Á¾·áÇÑ´Ù.



SELECT ¹®
SELECT¹®¿¡¼­ »ç¿ëµÇ´Â ¿¹¾à¾îµéÀº

INTO, FROM, WHERE , CONNECT BY, START WITH,GROUP BY,HAVING,ORDER BY, FOR UPDATE OF µîÀÌ ÀÖ´Ù.


EXEC SQL SELECT ename, job, sal + 2000

INTO :emp_name, :job_title, :salary

FROM emp

WHERE empno = :emp_number;



INSERT¹®


EXEC SQL INSERT INTO emp (empno, ename, sal, deptno)

VALUES ( :emp_number, :emp_name, :salary, :dept_number);



subqueryÀÇ »ç¿ë

subquery´Â INSERT¹®ÀåÀ̳ª CREATE TABLE¹®Àå µÚ¿¡¼­, UPDATE¹®ÀÇ Ä÷³À» ¸í½ÃÇÏ´Â °ÍÀ¸·Î »ç¿ë°¡´ÉÇÏ´Ù.


EXEC SQL INSERT INTO emp2 (empno, ename, sal, deptno)

SELECT empno, ename, sal, deptno

FROM emp

WHERE job = :job_title;



UPDATE¹®ÀÇ »ç¿ë


EXEC SQL UPDATE emp

SET sal = :salary, comm = :commission

WHERE empno = :emp_number;

UPDATE¹®¿¡¼­µµ subquery¸¦ »ç¿ëÇÒ ¼ö °¡ Àִµ¥ SETÀý¿¡¼­ Ä÷³ µÚ¿¡ »ç¿ëÇÑ´Ù.


EXEC SQL UPDATE emp

SET sal = (SELECT AVG(sal) *1.1 FROM emp WHERE deptno = 20)

WHERE empno = :emp_number;



DELETE ¹®


EXEC SQL DELETE emp WHERE empno = :emp_number;

INSERT¸¦ Á¦¿ÜÇÑ SELECT, UPDATE, DELETE¿¡¼­´Â WHEREÀýÀ» »ç¿ë°¡´ÉÇѵ¥, ÀÌ WHEREÀýÀº Å×À̺íÀÇ Æ¯Á¤ÇÑ ROW¸¦ ã´Â °Ë»öÁ¶°ÇÀÌ´Ù.

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79   MYSQL ±âÃÊ(2)    739
78   MYSQL ±âÃÊ(1)    710
77   MYSQL ¸í·É¾î ±âÃÊ    669
76   MySQL µ¥ÀÌÅͺ£À̽º ¿ë¾î Á¤¸® (°ü°èµ¥ÀÌÅÍ...    685
75   UNION À̶õ?    660
74   mysql limit    791
73   MS-SQL Limit ±¸ÇöÇÏ±â    764
72   MySQL Å×ÀÌºí »ý¼º ±¸¹®¿¡ ÄÚ¸àÆ® ´Þ±â    792
71   union°ú union allÀÇ Â÷ÀÌÁ¡    796
70   MySql ÇÔ¼öÁ¤¸®    1198
69   sql ¿¬»êÀÚ    1079

 
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