Oracle

In order to connect with the server, the client must first contact the listening process on the server. Oracle describes the connection information through the connection descriptor in the Tnsnames.ora file. The general Tnsnames.ora is built on the

Same point:1.truncate and delete without a WHERE clause, and drop deletes the data in the table.2.drop, truncate are DDL statements (data definition language) that are automatically committed after execution.Different points:1. Truncate and delete

Tag:oracle   linux    startup script     #!/bin/bash#chkconfig:35 99 01case  "$"  in         Start)                 echo  -e  "\n\t\t  ' date +%f '   ' date +%t '"                  echo -e  "\t\t  is starting lsnrctl start ...."                 su -

2015-10-19/*divided into four steps*//*1th Step: Create a temporary table space*/Create Temporarytablespace user_temp tempfile'/u01/app/oracle/oradata/orcl/user_temp.dbf'size 50m Autoextend on Next50m maxsize 20480m extent management local; /*2nd

To see if the database is an archive mode: Sql> Show parameter Db_flashback;NAME TYPE VALUE------------------------------------ ----------- ------------------------------Db_flashback_retention_target integer 1440sql> archive log list;Database

Oracle encountered a problem: in PL/SQL when the user name and password after entering the title of the error, I am a project database database is not backed up, there is a lot of data, it will not let me reload the database it, think of this I

Strange, no specific table structure information found Sql> describe dual;Name Type Nullable Default Comments----- ----------- -------- ------- --------DUMMY VARCHAR2 (1) YSql> SELECT * from dual;DUMMY-----XPurpose of the 2.DUAL tableDual is an

When you install Oracle, the state of the system requirements is detected as the wrong solution:Checking operating system requirements ....Required Result:One of the 5.0,5.1,5.2,6.0Actual results:6.1is actually caused by the configuration fileLocate

Environment Description:System: rhel6.4 X64bitOracle:oracle 11.2.0.4Database server, generally conditional, storage using raid1+0 mode, followed by Raid6, again raid5!Oracle Database Backup principles:Sunday full, Monday to Saturday differential

Two days ago I encountered such a problem at work, we have a program is used to incrementally extract the table data in EBS, there is a full-scale extraction, that is, first delete the data in the original table, and then re-extract the data, the

Do not say Dbfirst Fortunately, it and Modelfirst,codefirst are each have a good, because of already exist a large business library, use entityframework more inclined to Dbfirst, because many colleagues have been accustomed to directly modify the

Removes unnecessary characters from a string. The employee name contains the vowel (AEIOU), which must be removed now. Create a test table: Create or replace view v ASSELECT 'clark' AS ename from dualunion allselect 'King' AS ename from dualunion

ORA-01033: ORACLE initialization or shutdown in processOracle encountered a problem: after entering the user name and password in PL/SQL, a title error occurred. I have not backed up all the database databases in a project, and there is still a lot

ORA-01033: ORACLE initialization or shutdown in process, shutdowninprogress Oracle encountered a problem: after entering the user name and password in PL/SQL, a title error occurred. I have not backed up all the database databases in a project, and

Basic Oracle syntax -- Create table tb_myTable (mname vardhar2 (30), pwd varchar2 (30); -- create or replace procedure sp_myProcedure (p_name varchar2) isbeginend; exec sp_myProcedure ('20140901'); -- block declarev_ename emp. ename % type; --

In-depth analysis of saving and reading mybatis oracle BLOB fields, mybatisblob 1. BLOB Field BLOB refers to the writing of a Binary Large Object, that is, the English Binary Large Object, and CLOB refers to the writing of a Large Character Object,

Multi-table insert statement and table insert statement Multi-table insert statements can be divided into the following four types: ① Unconditional INSERT. ② Conditional insert all. ③ Transpose INSERT. ④ Conditional insert first. First, create a

Basic Oracle syntax and oracle syntax -- TableCreate table tb_myTable (Mname vardhar2 (30 ),Pwd varchar2 (30)); -- Stored ProcedureCreate or replace procedure sp_myProcedure (p_name varchar2)Is Begin End; Exec sp_myProcedure ('20140901 '); --

Saving and reading fields of the mybatis oracle BLOB type1. BLOB field BLOB refers to the writing of a Binary Large Object, that is, an English Binary Large Object, and CLOB refers to the writing of a Large Character Object, that is, the English

Delete duplicate records. Because data is manually input, duplicate data is often generated, and redundant data needs to be deleted. Create a test table: CREATE TABLE dupes( id integer, name varchar(10));INSERT INTO dupes VALUES(1,