Oracle

Definition: The escape keyword is often used to escape certain special characters, such as wildcards: '%' and '_' to the meaning of their original characters, the defined escape characters are generally '\', but other symbols can also be used.

Method 1: v $ versionSQL> select * from v $ version; www.2cto.com BANNER implements Oracle Database 11g Enterprise Edition Release 11.1.0.7.0-64bit Production PL/SQL Release 11.1.0.7.0-Production CORE 11.1.0.7.0 Production TNS for Linux: Version 11.1

Two Methods of oracle paging: Paging generally uses two methods: 1. Using rownum2, the analysis function row_number () over () select * from (select rownum row_num, tt. * from (select * from cgidata. nbz_act_task_tel_rela t order by t. updated_date)

Oracle 10 Gb limits the access of some IP addresses to the database. ORACLE can set both the blacklist and whitelist. The Blacklist must mean that all IP addresses in the whitelist are not allowed to access the database. All IP addresses in the

Oracle LOAD batch writes data to the production line database only has query permission. You need to import 50 million pieces of data to the R & D line under the production line. The following tips may accelerate the import speed. 1. connect to the

Oracle displays the SQL Execution history of a session. 1. view the worst-performing Top 100 sqlSELECT * FROM (SELECT PARSING_USER_ID EXECUTIONS, SORTS, COMMAND_TYPE, DISK_READS, SQL _text FROM v $ sqlarea ORDER BY disk_reads DESC) WHERE ROWNUM

Oracle sorting of null values: 1. Oracle determines that NULL is the maximum value by default when Order by is used, therefore, if ASC is in ascending order, it is at the end, and DESC is in descending order. 2. When the input parameter is null, use

The oracle stored procedure queries one or more records to Create a basic table -- Create tablecreate table USER_INFORMATION (P_ID NUMBER, USER_LOGIN_NAME NVARCHAR2 (30) to Create a package: create or replace package pack_test is type cur_test is

Oracle null Processing & sorting filtering oracle considers null to be the largest. Sort in ascending order. By default, the null value is placed behind. Sort in descending order. By default, the null value is ranked first. There are several ways to

Solution error when installing and uninstalling Oracle10g in Win7 solution error: A 32-bit Oracle10.2.0.1.0 is installed in Win7, and you want to install a 64-bit Oracle10g. When uninstalling with the Universal Installer, an error message is

After the oracle database is powered off, it cannot be opened after the database is suddenly powered off. Or enable it occasionally, but close it soon. There may be many reasons. But there is only one way to solve the problem: Look at the trace log,

Oracle unlock users this article is intended to solve the problem of Oracle 10 Gb user unlocking and restricted execution permissions. It is hoped that this article will help you understand Oracle10 Gb user unlocking is helpful. 1) The user is

An example SQL> CREATE TABLE IMAGE_LOB (2 T_ID VARCHAR2 (5) NOT NULL, 3 T_IMAGE BLOB NOT NULL 4); TABLE created. Www.2cto.com SQL> CREATE OR REPLACE DIRECTORY IMAGES AS 'C: \ Inetpub \ wwwroot'; the DIRECTORY has been created. SQL> create or replace

The aud file of the oracle asm instance is generated in the $ ORACLE_HOME/rdbms/audit directory on the Oracle 10 Gb database server. Check the log file and record all operations performed by sysdba to access the database instance ASM. Www.2cto.com:

The Oracle string splitting function needs to retain the previous batch insertion and deletion functions in the process of converting the data stored in the graphic system to the direct operation at the underlying layer of the database, this

Connect PL/SQL to the remote database. In the oracle installation directory, find tnsnames in D: \ softset \ OracleXE \ app \ oracle \ product \ 10.2.0 \ server \ NETWORK \ ADMIN. add the Oracle server information DB = (DESCRIPTION = (ADDRESS_LIST =

Strange query Problem and Solution for oracle 11g fields WITH resultTable AS (www.2cto.com SELECT B. stand_1__pri_id, B. PRODFAM_ID, B. PRODFAM_CODE, B. PRODUCT_LINE_ID, B. PRICE_LOOUP_TYPE, B. PRICE_LOOUP_CODE, B. stand_const, B. SALES_CHANNEL_TYPE,

Use the left and right connections to solve the problem of null query. The right connection of Oracle is www.2cto.com, and. all h1 content: select. h1, B. h2 from a, B where. h1 = B. h1 (+) Right join, B. all h2 content: select. h1, B. h2 from a, B

View data space usage use SQL statement View data space usage [code = & quot; SQL & quot;] www.2cto.com select dbf. tablespace_name corresponds to the tablespace, dbf. totalspace & quot; Total (M) & quot;, dbf. total totalblocks as blocks, dfs.

Reset oracle's sys User Password 1. search for the Instance name PWD in the oracle installation directory. ora file www.2cto.com 2. back up a password file (Be sure to avoid exceptions) 3. generate a new password file and enter the orapwd file = PWD