oracle Function
5.µ÷Óú¯ÊýFN_ADDONE
--------------------
SQL> SET SERVEROUTPUT ON
SQL> DECLARE CNUM NUMBER;
2 BEGIN
3 CNUM := USER1_ADB.FN_ADDONE(3);
4 DBMS_OUTPUT.PUT_LINE('CNUM = ' || CNUM);
5 END;
6 /
CNUM = 4
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6.ɾ³ýº¯ÊýFN_ADDONE
--------------------
SQL> DROP FUNCTION USER1_ADB.FN_ADDONE;
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select [level],colomn,...from table
[where where_clause]
[ [start with start_condition] [connect by prior prior_condition]&nbs ......
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2.ÔÚÖÕ¶Ë´°¿ÚÊäÈë sqlplus /nolog
[oracle@hylinux ~]$ sqlplus /nolog
SQL*Plus: Release 10.2.0.1.0 - Production on ÐÇÆÚ¶þ 7ÔÂ 29 14:26:16 2008
Copyright (c) 1982, 2005, Oracle. All rights reserved.
& ......
select column_name from all_cons_columns cc
where owner='SSH' --SSHΪÓû§Ãû³Æ£¬Òª×¢Òâ´óСд
and table_name='SYS_DEPT' --SYS_DEPTΪ±íÃû£¬×¢Òâ´óСд
and exists (select 'x' from all_constraints c
where c.owner = cc.owner
and c.constraint_name = cc.constraint_name
and c.constraint_type ='P'
......
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SQL> select
instr('yuechaotianyuechao','ao') position from dual;
POSITION
----------
6
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