Oracle

To view the character set:SELECT * from V$nls_parameters;SELECT * from Nls_database_parameters;To modify a character set:Sqlplus "/as sysdba"Shutdown immediate;startup Mount;Alter session set Sql_trace=true;Alter system enable restricted

#!/bin/Bash#Oracle Environment Variables Nls_lang=American_america. Al32utf8oracle_sid=Zgworacle_base=/opt/Oracleoracle_home=/opt/oracle/11gPATH= $PATH: $ORACLE _home/bin: $HOME/binexport oracle_sid oracle_base oracle_home nls_lang PATH#获取时间戳export

--View of database nameSelect name from V$database;650) this.width=650; "Style=" Background:url ("/e/u261/lang/zh-cn/images/localimage.png") no-repeat Center;border : 1px solid RGB (221,221,221); "src="/e/u261/themes/default/images/spacer.gif "alt="

--View of database nameSelect name from V$database;650) this.width=650; "src="%5c "alt=" spacer.gif\\ "\" "/>--View of instance nameShow parameter instance_name;650) this.width=650; "src="%5c "alt=" spacer.gif\\ "\" "/>--Data filesSelect name from V$

Test table DataSELECT * FROM test01ID NAMETen CLARKTen KINGTen MILLERADAMSFORDJONESSCOTTSMITHALLENBLAKEJAMESMARTINTURNERWARD1.wmsys.wm_concat usage (at 10g)This function is common, but Oracle's official documentation is not supported and is obsolete

The Oracle character set is a collection of symbols that interpret a byte of data, have a size, and have a mutual containment relationship. ORACLE's support for national language architectures allows you to store, process, and retrieve data using

Oracle timer, once set, the server reboot does not affect the execution of the Oracle timer (scheduled daily execution),Begin Sys.dbms_job.submit (Job: job, what = ' check_err; ', next_date = trunc (sysdate)

The update operation meets the criteria, and the insert operation does not conform.Merge intoMyd_nsrdt nusing (Select '9' asMydtmid,'1' asTmtype,'370200123456788' asNSRSBH,"' asNSRMC,'SN' asRegion4 asPf"' asYj'18888888888' asPhone'18888888888'

This period of time has been using MYBATIS+SPRING+SPRINGMVC framework, summed up something.Oracle paging notation for MyBatis: #{oraclestart}]]>The case where this method is called by the page:Select asset_id as AssetID,From Asset_infowhere

1 SELECT ' ALTER TABLE ' | | t.table_name| | ' disable constraint ' | | t.constraint_name| | '; ' From user_constraints t WHERE t.constraint_type = ' R '; 2 SELECT ' ALTER TABLE ' | | table_name | | ' ENABLE CONSTRAINTS ' | | T.constraint_name | | ';

--oracle Database Creation Table spaceCreate Tablespace New_taspace--Table space nameDataFile ' D:\NEWTABLESPACE. DBF '-The data file and location associated with the TablespaceSize 200M--File Initial sizeAutoextend on next 20MB MAXSIZE 400MB;

--Stored Procedure syntaxCreate or Replace procedure name (Parameter 1 in/out type (cannot give length),Parameter 2 in/out type (cannot give length),Parameter 3 in/out type (cannot give length)) isParameter 4 type (can give length);Parameter 5 type (

--==cmd Console ==----== Daily User Management sql==----Connect to Sqlplus>sqlplus/nolog--Connect as DBASql>conn/as SYSDBA--Modify the user password to modify the system user's password to systemSql>alter user system identified by

Grammar:Select * from with column = ? Connect by [[Prior] T.parentidFor example: Menu table, table structure is as follows　　The data are as follows:　　First, from the top down1. Query all sub-menus for a specified IDSelect * from with=1 by= T. "

CREATE TABLE STUDENT (--Creating student tablesID Number (TEN) PRIMARY key,--primary Key IDSNAME VARCHAR2 (20),);You must specify an ID when you add data to the student tableINSERT into STUDENT VALUES (1, ' Tom ');The following combination of

ORA-28001: the password has expiredOracle prompt error message ORA-28001: the password has expiredCause: due to the new features of Oracle 11G, the default password expiration limit for Oracle 11G users is 180 days. If the user password is not

SQL: Oracle 11g create procedure, oracle11g Create or replace procedure proc_Insert_BookKindList (temTypeName nvarchar2, temParent int) ASncount number; begin -- select count (*) INTO ncount FROM BookKindList fm1 where EXISTS (SELECT BookKindName

NUMBER (x, y) Data Types in Oracle databases Test preparation Analysis and Experiment 1 processing of decimal part 2 maximum value that can be saved 3 Minimum value that can be saved Summary The NUMBER data type of Oracle indicates a decimal NUMBER,

Oracle SQL Performance Optimization and oraclesql Performance Optimization (1)Select the most efficient table name sequence (valid only in the rule-based Optimizer ):The ORACLE parser processes the table names in the FROM clause in the order FROM

Oracle stored procedure execution can input SQL statements and return result sets 1. Create a test table: Create table AAA (aa NVARCHAR2 (100), bb NVARCHAR2 (100), cc NVARCHAR2 (100), dd NVARCHAR2 (100 )) and import the test data insert into aaa