Oracle

The ORACLE sqlplus prompt setting changes the sqlplus prompt to the following, which can remind you of the user mode and reduce misoperation. SQL> set sqlprompt "_ user' @ '_ connect_identifier>" SYS @ ocp10g> conn system/password; www.2cto.com is

Solution to the problem caused by sga_max_size modification of oracle9i in order to improve oracle performance, try to modify some parameters. As a result, after sga_max_size = 2 GB is modified, the database fails to start (it is later known that

DBMS_RANDOM package usage in ORACLE 1. dbms_random.value method dbms_random is a package that can generate random values or strings. This package includes several functions, including initialize (), seed (), terminate (), value (), normal (), random

Oracle variable binding statements do not like to see the use of procedure | concatenates SQL statements, so an example of variable binding is provided. It is only for reference in Java code create or replace procedure using_test (t_name nvarchar2)

Oracle array type the array type of Oracle. Example: SQL code create or replace function my_test (p_str varchar2) return number as -- Common variable v_var varchar2 (1000 ); -- fixed length array type v_ar is varray (10) of varchar2 (30); my_ar v_ar:

Oracle unlock scott user 1. login SQL * plus through the System user, alter user scott account unlock; then conn scott/tiger; connection. 2. How do I set the password management after oracle creates a database? Log on to Oracle as a super

The database user is deleted, and the tablespace and data files are all there. How to restore the environment: www.2cto.com [html] SQL> select * from v $ version where rownum = 1; BANNER ---------------------------------------------------------------

In oracle, the distinct record statement (without distinct) can only filter all records in the query field with the same distinct keyword (the record set is the same), but it does not work if you want to specify a field, in addition, distinct

Several ways to delete a table in Oracle: DELETE the table (record and structure) language name DELETE ---- truncate ---- drop delete (DELETE the statement recorded in the data table) www.2cto.com delete from table name WHERE condition; note:

The directory for creating the oracle 11g logminer experiment: mkdir-p/home/oracle/logmnr www.2cto.com will be archived to open the archive analysis experiment. Install three packages: dbmslm. SQL dbmslmd. SQL dbmslms. after the SQL statement is

Oracle deletes the data SQL code www.2cto.com CREATE OR REPLACE PROCEDURE "INDI_DEL_PRO" (IDPARA IN INDIVIDUALVIEW. ID % TYPE, categorypara in individualview. CATEGORY % TYPE, returnpara out number) as applyno individualview. APPLY_NO % TYPE; begin

Oracle SQL Test 2 SQL code www.2cto.com cid Region (Region) Saler (salesman) Money (contract amount) 1 Beijing Yang Jian 100 2 Shanghai President 200 3 Hangzhou deputy regiment 500 4 Shanghai President 200 5 Shanghai Yang Jian 400 6 Beijing

Query the IDs that do not exist in the Database. Suppose your database has A table A: www.2cto.com ID NAME1 aaa2 bbb3 ccc4 ddd requirement: How many IDs do you need to return the IDs that do not exist in Table? The following code returns. 1.,.

Oracle partition execution plan range partitions available operations: www.2cto.com partition table, by n1, n2 partition range single: access a single partition range iterator: Access Multiple partitions partition range inlist: the partition key

Oracle connection error-Connected to an idle instance solution symptom and solution: phenomenon: www.2cto.com PL/SQL Developer cannot connect to the database instance, prompting no listening SID. Use sysdba to log on and prompt Connected to an idle

Oracle needs to list all the months in a specified time range when a system is created today: www.2cto.com collects statistics on the data volume in a specified time range by month, after the SQL statement is written, the system finds that the month

First, configure the listener and client so that database A is the client, database B is the server, and B opens the listener for its own IP address,A opens the customer connection channel for Bip. Www.2cto.comAip: 192.168.18.47B ip Address: 192.168.

Drop all from schema owner SQL code www.2cto.com -- To drop all user objects under a schemad set heading off; set feedback off; set echo on; set serveroutput off; set termout off; spool drop_all_objects. SQL select CASE object_type WHEN 'table' then'

Oracle merges multiple columns into a row wm_concat Oracle merges a column of the table after group by. The function of separating the columns by commas or merging a column of www.2cto.com in the entire table is as follows: merge a column in the

How to view and modify the Oracle encoding format -- view the Oracle database character set: select userenv ('language') from dual; query result: www.2cto.com SIMPLIFIED CHINESE_CHINA.AL32UTF8 -- modify the oracle database character set: (in SQL