Oracle

/**scm_iss.test_imti_fun2* function*/create OR REPLACE FUNCTION test_imti_fun2 (p_no in number) with input parameters RETURN VARCHAR2 is P_imti_name VARCHAR2 (200); P_imti_desc VARCHAR2 (200); P_return VARCHAR2 (200); BEGIN--select i.imti_name

(1)Select the most efficient table name order (valid only in the rule-based optimizer):The Oracle parser processes the table names in the FROM clause in a right-to-left order, and the FROM clause is written in the final table (the underlying table,

1. The following steps: Start key--Enter run-in Sqlplus enter username: sys input password: SYS as SYSDBA//NOTE: The password entered here must follow the as SYSDBA.      sql> alter user Scott account unlock; The user has changed.      Sql> commit;

This paper is implemented by EXP/IMP, the database table space needs to be in read-only mode, and for the production database of real-time application, it can be used to transfer table space using Rman method.The following restrictions apply to the

When you run the status of the Lsnrctl command, you often see the following return values: the Service "test" consists of 1 routines. Routine "MyData", State unkown, contains a handler for this service ... Service "A" consists of 1

1. Automatically generate Oracle backup files based on date@echo offEcho is backing up the Oracle database, please wait a moment ...Exp userid= ' username/password @sid ' file=d:\bak\res_%date:~0,4%%date:~5,2%%date:~8,2%.dmp log=d:\bak\res_%date:~0,4

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Mysql-implements Oracle-row_number () over (partition by) grouping sorting functionBecause MySQL does not provide a rich analysis function like over () in Oracle. So in MySQL we need to implement such a function, we can only use a few flexible

1, first to download the installation cx_oracleNote: The downloaded version of Cx_oracle is consistent with its own version of the Python environment, or the database may be connected to an error. 2. Database table structure3. Python

1, common date type data types1.1. DATEThis is the most commonly used date type for Oracle, which can hold dates and times, which can be used for common date processing. Date range may be from January 1, 4712 to December 31, 9999 A.D.The date type

SELECT * from User_tab_comments a where a.comments like '% operation% ' data dictionary look up all tables in the database with the word "action"static Data dictionaryThis type of data dictionary consists primarily of tables and views, and it should

Oracle decimal point retention problem 2013-03-03 11:45:49 I'd like to say two shm2008520 collections I want to contribute Oracle decimal point retention problem   If you need to use the Oracle decimal

Many times, we need to perform Oracle backup through the client, where we use automated tasks from Windows to automate Oracle backup and backup cleanupThe use of automatic tasks is slightly1. Create an automatic backup script@echo off @echo =========

Today 4 o'clock in the morning, the person in charge of the scene of the customer called me, said very strange, the download function is fast and slow. This download is very complex, and I've been optimizing it before, turning on the computer in

1, today to investigate an Oracle database problem, found in 11g a Chinese character accounted for 2 bytes, in 10g accounted for 3 bytes, resulting in 11g database data import into 10g always error, at the beginning of the thought is 11g and 10g

New Feature of Oracle11g virtual column partitioning There is a need: a document table should be partitioned by month. If it is on Oracle 10 Gb, only one field can be added. It will be different after the Oracle 11g. You can use virtual column

Oracle technology _ UTL_FILE package Usage Details _ writing files, reading and receiving tables UTL_FILE is a standard toolkit provided by oracle for reading and writing files. This document describes how to use this package through an instance.

Installing oracle software using NFS Yesterday, I used openfiler to create a nas storage system and install the oracle software. Everything went well before that. A ora error was reported when I created a database. When I used nfs to install the

ORACLE _ Data Processing ORACLE _ Data Processing ① Data manipulation languageDML (Data Manipulation Language-Data Manipulation Language) can be executed under the following conditions:Insert data to a tableModify existing dataDelete existing

How to Restore Archive logs from a backup set in oracle How Does oracle capture archived logs from the backup set? In Dalian Hospital, the database is archived. However, after archiving, rman uses crontab to automatically archive the logs and