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CREATE TABLESPACE mytablespace DATAFILE   
  'F:\oracle\product\10.2.0\oradata\myoracle\MYTABLESPACE01.DBF' SIZE 500M AUTOEXTEND ON NEXT
100M MAXSIZE UNLIMITED  
LOGGING  
PERMANENT  
EXTENT MANAGEMENT LOCAL AUTOALLOCATE  
BLOCKSIZE 8K  
SEGMENT SPACE MANAGEMENT MANUAL  
FLASHBACK ON;
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CREATE USER ECC_NOTE IDENTIFIED BY sys
PROFILE DEFAULT
DEFAULT TABLESPACE mytablespace
TEMPORARY TABLESPACE temp
ACCOUNT UNLOCK;
GRANT UNDER ANY TABLE TO ECC_NOTE WITH ADMIN OPTION;  
 
GRANT UNDER ANY TYPE TO ECC_NOTE WITH ADMIN OPTION;  
 
GRANT UNDER ANY VIEW TO ECC_NOTE WITH ADMIN OPTION;  
 
 
GRANT "DBA" TO ECC_NOTE WITH ADMIN OPTION;  
GRANT "OLAP_DBA" TO ECC_NOTE WITH ADMIN OPTION;  
GRANT "OLAP_USER" TO ECC_NOTE WITH ADMIN OPTION;  
GRANT "SELECT_CATALOG_ROLE" TO ECC_NOTE WITH ADMIN OPTION;  
ALTER USER ECC_NOTE DEFAULT ROLE "DBA", "OLAP_DBA", "OLAP_USER", "SELECT_CATALOG_ROLE";  
 
ALTER USER test QUOTA UNLIMITED ON ECC_NOTE; 


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      Ò»°ãOracleÊý¾Ý¿â(Oracle Database)¿ÉÒÔ·ÖΪÁ½²¿ ......

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1. ASCII
·µ»ØÓëÖ¸¶¨µÄ×Ö·û¶ÔÓ¦µÄÊ®½øÖÆÊý;
SQL> select ascii(A) A,ascii(a) a,ascii(0) zero,ascii( ) space from dual;
A A ZERO SPACE
--------- --------- --------- ---------
65 97 48 32
2. CHR
¸ø³öÕûÊý,·µ»Ø¶ÔÓ¦µÄ×Ö·û;
SQL> select chr(54740) zhao,chr(65) chr65 from dual;
ZH C
-- ......

Oracle RETURNING INTO Ó÷¨Ê¾Àý

The RETURNING INTO clause allows us to return column values for rows affected by DML statements. The following test table is used to demonstrate this clause.
DROP TABLE t1;
DROP SEQUENCE t1_seq;
CREATE TABLE t1 (
id NUMBER(10),
description VARCHAR2(50),
CONSTRAINT t1_pk PRIMARY KEY (id) ......

oracleµÄnvlº¯ÊýµÄÓ÷¨

oracleµÄnvlº¯ÊýµÄÓ÷¨ ͨ¹ý²éѯ»ñµÃij¸ö×ֶεĺϼÆÖµ£¬Èç¹ûÕâ¸öֵλnull½«¸ø³öÒ»¸öÔ¤ÉèµÄĬÈÏÖµ
select nvl(sum(t.dwxhl),1) from tb_jhde t where zydm=-1ÕâÀï¹ØÐĵÄnvlµÄÓ÷¨£¬nvl£¨arg,value£©´ú±íÈç¹ûÇ°ÃæµÄargµÄֵΪnullÄÇô·µ»ØµÄֵΪºóÃæµÄvalue
Èç: NVL(a,b)¾ÍÊÇÅжÏaÊÇ·ñÊÇNULL,Èç¹û²»ÊÇ·µ»ØaµÄÖµ£¬Èç¹ ......

Oracle ³£Óú¯Êý×ܽá

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1,
ASCII
·µ»ØÓëÖ¸¶¨µÄ×Ö·û¶ÔÓ¦µÄÊ®½øÖÆÊý;
SQL> select ascii(A) A,ascii(a) a,ascii(0) zero,ascii( ) space from dual;
A A ZERO SPACE
--------- --------- --------- ---------
65 97 48 32
2. CHR ......
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