Oracle

The following describes the steps to manually create a database in Oracle: 1. Confirm the new database name and Instance name; 2. Confirm the authentication method of the database administrator; 3. Create an initialization parameter file;

Multiple methods for querying the maximum time record in a group: [SQL] create table dispatch_result (dr_id number not null, sheet_id number, check_next varchar (20), check_time date, check_sn char (8), check_comment varchar (255), check_status

Oracle network configuration and connection management oracle network configuration, for the use of PL/SQL Developer to connect to Oracle errors, especially when the network environment changes caused by connection errors. The listener. ora, sqlnet.

When installing oracle software in the oracle tar mode, if the operating system is the same, you can directly install the software tar. It should be noted that tar can be used only when all minor versions of the system are the same. Www.2cto.com can

Flash_recovery_area space pressure causes ORA-01033: ORACLE is initializing or disabling the problem as follows: SQL> conn/as sysdba is connected. SQL> conn hr/hrERROR: ORA-01033: ORACLE initializing or disabling warning: you are no longer connected

Create a tablespace in ORACLESQL code/* consists of four steps * // * Step 4: create a temporary tablespace */create temporary tablespace user_temp tempfile 'd: \ oracle \ oradata \ Oracle9i \ user_temp.dbf 'size 50 m autoextend on next 50 m maxsize

Use the script to create the scott mode. First, check my database version SQL> select * from v $ version; BANNER implements Oracle Database 11g Enterprise Edition Release 11.2.0.1.0-ProductionPL/SQL Release 11.2.0.1.0-ProductionCORE 11.2.0.1.0

Oracle 11g restart uard undo restore environment: OS: centos5.5db: oracle11g datauardversion: 11.2.0.2.0 shrink data file size in primary ALTER DATABASE DATAFILE '/oracle/oradata/skatedb/undotbs03.dbf 'resize 1024 M; www.2cto.com will receive an

Oracle function-based indexes, such as executing the following SQL statement: select * from emp where upper (ename) = 'King', even if an index is created on the ename, the emp table will be scanned in the entire table, And the ename field in the

Oracle cold backup operation manual 1 There are three standard backup and recovery modes for Oracle cold backup: Backup Recovery (physical) and Import/Export (logical ), backup recovery can be divided into non-archive mode (Nonarchivelog-style) and

In oracle, convert columns to the wm_concat function after 10 Gb rows in oracle. Use the test data to create table test (id number, name varchar2 (20); insert into test values (1, 'A'); insert into test values (1, 'B'); insert into test values (1,

The insert SQL statement used to export the joined table in the stored PROCEDURE. To facilitate the data migration of the three associated tables, export the data into an insert SQL statement. By the way, let's take a look at PROCEDURE.Usage TABLE

The nested loop of Oracle table connection executes a query SQL statement in the database system. If this query only operates on one table, it only involves access to this table and associated objects. There are usually three access methods: full

One-to-multiple table Field update SQL statement table T_A www.2cto.com id name1 Zhang weisan 2 LITH table T_ B id name1 zhangs1 zsan1 zs2 lisi2 ls www.2cto.com objective: change the name of the record corresponding to the id in Table T_ B and the

Oracle pl/SQL: batch extraction all data can be extracted from the cursor result set at one time by using the fetch... bulk collect into statement. Www.2cto.com SQL code -- use fetch... bulk collect into to extract all data/* Use Substitution

Oracle em cannot start solve sysman, dbsnmp password modification: www.2cto.com 1, SYSMAN Password Change 1, stop dbconsole [oracle @ xxx ~] $ Emctl stop dbconsole check the status and confirm that dbconsole has stopped [oracle @ xxx ~] $ Emctl

In oracle, tables like BIN $ MrkCYT9eTTK + 0sStMwn7 + Q = $0 are not deleted from oracle10g, but stored in recyclebin, in this process, files deleted in windows will be temporarily stored in the recycle bin. The system will automatically rename the

The introduction of sqlplus and sqlplusw oracle is really difficult to cook in the database. It took a long time to install 11 GB, But it encountered the problem of unable to run sqlplusw: www.2cto.com found a lot of reincarnation on the Internet,

Oracle lpad usage pad Translation: Fill the lpad function, add the specified String on the left side of the String, usage: www.2cto.com lpad (String, capture length, added String ). It is not accurate to add a String. A more accurate statement is to

Oracle notes: Tables and fields (1) 1. CREATE a TABLE: www.2cto.com first CREATE a TABLE and a field: create table mytable (id number (12) not null, NAME VARCHAR2 (32), DESP VARCHAR2 (100), age number (3 ), brithday date default sysdate) tablespace