Oracle

Millisecond conversion to date 1 2 3 SELECT To_char (1406538765000/1000 * *) + to_date (' 1970-01-01 08:00:00 ', ' yyyy-mm-dd HH:MI:SS '), ' Yyyy-mm-dd HH24:MI:SS ') as CDATE from DUAL; Date conversion milliseconds

Create a temporary table space Create temporary tablespace zfmi_temp Tempfile ' d:oracleoradatazfmizfmi_temp.dbf ' Size 32m Autoextend on Next 32m MaxSize 2048m Extent management Local; The Tempfile parameter must have Create a datasheet

Load balancing is to increase the overall performance by allocating the load evenly to each node in the cluster. Oracle RAC provides two ways to achieve load balancing, the following is a detailed introduction, the need for friends can refer to the

The following is a detailed analysis of the use of DBMS_METADATA.GET_DDL in Oracle, the need for friends under the reference DBMS_METADATA.GET_DDL () is used to get the DDL for the object, as follows. Note: In Sqlplus, to better demonstrate the DDL,

An Oracle character set is a collection of symbols that are interpreted as a byte of data, having a size and a mutual containment relationship. Oracle's support for the national language architecture allows you to use localized languages to store,

Status of all instances and services [Oracle@vzwc1 ~]$ srvctl status database-d ZWC Instance ZWC1 is running on node VZWC1 Instance ZWC2 is running on node VZWC2 Status of a single instance [Oracle@vzwc1 ~]$ srvctl status instance-d zwc-i zwc1

Dbms_random. STRING (VAR1,VAR2) This function has two parameters The VAR1 parameter values are: U,l,a,x,p U-->uppercase L-->lowercase A-->mixed case X-->uppercase,alpha&numeric P-->any printable Char The above parameter values can also be in

I. BACKGROUND There are two sid:asid,bsid, two user auser1,auser2 under Asid, and a user Buser1 under Bsid. Among them Auser2 and Buser1 established the Dblink. You now want to access the three tables Table1,table2,table3 information and function

Oracle 11.2.0.1 logical Standby Library Environment setup After you create a physical standby library and create a physical fallback library, it's best to create your own spfile Stop redo application on physical standby ALTER DATABASE recover

Windows enables Oracle to back up every night via exp and retains 10 days of backup data. 1. Establish Backup Scripts Oraclebackup.bat First create a backup bat file, under E disk to create a new backup directory oraclebackup, DMP, log, the Oracle

Oracle and Firewall settings To access the Windows Oracle database behind the firewall, it is not possible to simply open the fixed TCP port. The root cause of this problem is the BT design of the Windows Oracle Database (Unix/linux is not the

How to monitor the status of Oracle database tables and table spaces Declare UNF number; UNFB number; FS1 number; FS1B number; FS2 number; FS2B number; FS3 number; FS3B number; FS4 number; FS4B number; Full number; FULLB number; Begin

oracle| Data | Database Oracle Object Server contains six objects 1.OraClient 2.OreSession 3.OraConnection 4.OraDatabase 5.OraDynaset 6.OraSQLstmt 7.OraField 8.OraParameter 9.OraParameterArray 1.Oraclient objects Oraclient object to record all

Let's take a look at Oracle's encryption of table-sensitive fields through the Dbms_crypto package, a friend who needs to know. In the security more and more attention to the near body, we often need to a table in the Database sensitive column data (

1.TRUNC (for dates) The date value that the Trunc function truncates for the specified element. Its specific syntax format is as follows: TRUNC (Date[,fmt]) which Date value FMT the date format, which is truncated by the specified element

CREATE TABLE Employees ( EMPLOYEE_ID Number (6), Last_Name VARCHAR2 not NULL, Email VARCHAR2 (25), Salary number (8,2), commission_pct number (2,2), Hire_date date not NULL, ... DEPARTMENT_ID Number (4), CONSTRAINT emp_dept_fk FOREIGN KEY

A substitution variable refers to the input of data by the user in the case of a data query or update, with & tags in Oracle, such as Select Ename,job,sal,hiredate from emp where sal>&inputjob an input prompt appears when executed through SQL

When writing a stored procedure in Oracle, a large SQL statement is sometimes used, but when viewed with the Pl/sql tool test you cannot see the SQL, and the discovery can be handled through an Oracle physical temporary table. Add

If you manage some application projects under the Oracle database that have a large number of modifications to delete operations, data indexing needs to be periodically rebuilt. It can not only improve query performance, but also increase the

Willpower88 Method One: Oracle deadlock is very frustrating, summed up some of the experience as learning notes 1. Check which process is lockedCheck V$db_object_cache view: SELECT * from V$db_object_cache WHERE owner= ' The owning user ' and