Oracle

If the Oracle database Time field is set to the number type, the query time column is presented as a numeric value, such as the "1241450728000" style, is not readable, and the "2009/5/4 15:25:28" style update time prompts " Ora-01722:invalid number "

1. What is the tube state and the target State: The state of the operating system when it is running the management program of the systems. Any instruction, including privileged directives, can be executed in this state.The configuration refers to

problem There is a query Dba_ related data dictionary view, compile at the prompt ' table or view does not exist ', compile does not pass. But the statement of the error can be found in SQL, stating that the problem is not caused by a ' table or

Oracle CREATE DATABASE Let's take a look at the wizard first. oracle-oradb10g_home1 in the Start menu | Configuration and Migration Tools | Database Configuration Assistant. 1. Enter the database Configuration Assistant page, in the following figure,

Database Export function: 1 completely export database test, user Name System Password Manager exported to D:\daochu.dmpExp System/manager@test file=d:\daochu.dmp full=y2 Exporting a table from the system user in the database to the SYS userExp

1. Analysis table and index (analyze will not rebuild the index) Analyze Tabletablename COMPUTE StatisticsEquivalent to analyze table TableName compute statistics for table for all indexes ForAllThe statistics for table exist in the view:

zzj@rac1> EXPLAIN Plan for SELECT * from T_user; explained. Zzj@rac1> SELECT * from TABLE (Dbms_xplan. DISPLAY); Plan_table_output ---------------------------------------------------------------------------------------- Plan Hash value:2508602004 ---

Exists can be said to be a more common use of Oracle database development, with exists can improve the efficiency of SQL, can replace in. exists is to determine whether the SQL statement after exits is true, if the whole SQL sentence is true,

Operating system: Windows 7Database version: 11.2.0.1Problem Description:Directly through the Sqlplus SYS/ORACLE@10.10.100.109:1521/YSXT as SYSDBA can login, but through the Sqlplus SYS/ORACLE@YSXT as SYSDBA can not log in, reported ORA-12557:TN S:

In and exists I believe a lot of friends like me, have been for these two questions about who the faster problem tangled up, and also the brain for some reason to write down some of the standards, such as in the case of small child table in a

1. Extract Packages 2. Double click "Step.exe" in installed directory 3. Just click Next in Configure Security Updates phase (ignore warning) 4. Choose option "Create and configure a database" in Grid installation Options 5.

Premise: CREATE TABLE booking ( ID INTEGER not NULL, date_made date, reserved_until TIMESTAMP, Price DECIMAL (15), 2) Not NULL, purchase_id INTEGER, PRIMARY KEY (ID)) Create sequence Booking_seq start with 1 increment by 1

Background: The processing of null values when sorting, As stated in the Oracle official documentation, a null value is a special value type in the sort process, which is considered the maximum when sorted by default, in other words, when the

Understanding Oracle Execution Plans is the first step in optimization, let's start with the example below. The following supplementary content 1. Create Test table[SQL] view plain copy sql> create table t as Select 1 id,object_name from

User Management under Oracle database 1. Create User to create a user's basic command: (1) must be administrator rights to create a user (2) What is the command to learn to create a user (3) The newly created user does not have any

A new database 1 Sql>conn/as sysdba//Use SYS login 2 sql>create tablespace space1 datafile ' D:\oracle\JG.dbf ' size 1000M autoextend on; Space1 table space name, creating tablespace 3 Create user User1 identified by 123 default Tablespace Space1;

cmd Import Export Oracle database first open the cmd small window, enter the following command 2017-08-17 Supplement: Delete your own Oracle database a few days ago, find exp and IMP Import Export command, cannot use, it seems, if you do not

Oracle database objects and user management www.ncn.cnThe management and maintenance of the pattern object of Oracle DatabaseThis section focuses on the management and maintenance of schema objects for Oracle databases, which include

Oracle's coding has always been a very important issue, has been summed up before, but have forgotten, today to write again here. First look at the Oracle database encoding Sql> SELECT * from nls_database_parameters where parameter = '

An Oracle Batch Insert method is compiled from the Internet to review the relevant data: [Java]  View plain copy                            select s_forum_userid. nextval from dual                                   insert into dept (Deptno , dname ,