Oracle

Create Tablespace GRPDataFile ' e:/grp_tbspace.dbf 'Size 3000MAutoextend on next 5M maxsize 5000M;/* 3rd step: Create user and specify Tablespace */Create user tctest0707 identified by a default tablespace GRP temporary tablespace temp profile

First, the environment12c ADG EnvironmentIi. description of the phenomenonMain Library Log switch stuck (hang)SQL> alter system switch logfile;Third, the processing process1. View Logs$tail -f al*.logMon Jan 08 21:04:20 2018ARC0: LGWR is scheduled

In the previous article, I used a case to demonstrate how the selection is calculated for a field of numeric or string type. It also proves that when the selection of the field value is not the same, it will affect the CBO to choose the final

Transferred from: http://www.cnblogs.com/chay1227/archive/2013/03/17/2964020.htmlTransferred from: http://blog.csdn.net/allen879/article/details/40461227Transferred from: http://blog.itpub.net/28912557/viewspace-776770/Due to the project needs, the

Like after% position does not go index problemcreate table t2 as select * from dba_objects;——创建表create index idx_t2_name on t2(object_name);——创建索引set autotrace on ——开启执行计划跟踪select * from t2 where object_name like ‘DE%‘;——走索引select * from t2 where

We mainly learn some basic operations of the database, such as how to create users in the database, authorization, delete users, reclaim permissions, lock or unlock users and other common operations.First, we want to know how to write the user's

Distinct: to repeatMysql:①ifnull (field, 0): The function is null then ISNULL () returns 0.COALESCE (field, 0) is consistent with ifnull (field, 0) usage.Group by must be placed before order by and limit.Oracle:①NVL (field, 0): The function is null

if the user name of the lead-out library is Tiger, the password is 1 imported to the username is Scott, the password is 1Backup LibraryEXPDP Tiger/[email protected] dumpfile=expdp.dmp directory=dpdata1; Export a expdp.dmp file. Import LibraryCreate

The Tag:pre    is     role    ott    process     pos   ant   create    authorized     --Create a userthe CreateUSER by test_user;--creates a role for creating roles connect2;--for role authorization GRANTCREATE to connect2; GRANT SELECT on to

For Oracle stored procedures, throwing exceptions can be thrown into code or logged with a table. If your system application has a lot of nodes, like 40 of our nodes, if the wrong throw into the code, the error can not be found at all, it is best to

MVN Install:install-file-dgroupid=com.oracle-dartifactid=ojdbc6-dversion=11.2.0.1.0-dpackaging=jar-dfile=d:\app \lenovo\product\11.1.0\db_1\jdbc\lib\ojdbc6.jar (Driver package in Oracle installation directory)Pom file after installation is

CREATE TABLEADVICE (IDINT not NULL, ACTIVEINT DEFAULT 1 not NULL, TYPEINT not NULL, MSGVARCHAR2( +) not NULL, ADVICEVARCHAR2(4000) not NULL,PRIMARY KEY(ID),CONSTRAINTAdvice_uniUNIQUE(type,msg)) Tablespace MYDB; --Create a self-increment ID named:

　Simply put, if the use of jdk1.2 and jdk1.3 use Classes12.jar, if the use of jdk1.4 and jdk1.5, choose Ojdbc14.jar.　　　Drive Pack Classes12.jar for JDK 1.2 and JDK 1.3, and Ojdbc14.jar for JDK 1.4 and above, so try not to use Classes12.jar;Select

In theOracle spatial Partitioning application Research: partition and sub-table query performance comparison has been explained: by the county partition + Global Spatial index efficiency is better than by county partition + local spatial index, so

How to save images to the Oracle database (Code tutorial ), 1. Save images to the Oracle database The structure of the example Table NEWS is: newsid number (10), title varchar2 (100), image (blob) Method 1: Use the OracleCommandBuilder class (this

Precautions for importing data from Oracle IMPDP (undo/temp) and impdpundo For Oracle data migration, we may use the expdp/impdp method. Sometimes large tables and lob fields may consume large temporary and undo tablespaces. Therefore, we generally

Create and use oracle sequence, and create oracle SequenceCreate and use an oracle sequence (16:14:09)---------------------------------------------------------------------------------------------------Reprinted token ---------------------------------

ORA-22922: does not exist how to solve the LOB Value Problem ?, Ora-22922lob I have been doing custom report management these days, and this problem is annoying. Replace (to_char (wmsys. wm_concat (distinct to_char (ws. userdefined5), ',') as

Oracle uses orderby to sort null values. When order by is used in Oracle for query and sorting, if there is a null value in the sorting field, the sorting result may not reach the expected result. For example: [SQL] view plain copy Select * from

Oracle stored procedure, declaration variable, for loop explanation, oracle Stored Procedure Oracle stored procedures, declared variables, and for Loops 1. Create a stored procedure Create or replace procedure test (var_name_1 in type, var_name_2