Oracle

1, architecture, DB2 examples and database keyword separation practices, I am still a comparative favorite, because the instance can be created multiple, the recovery of the database directly to the instance can be, relatively more than Oracle. 2,

SELECT DISTINCTB.LVL level,B.operation_seq_num process,Msi1.segment1 the parent code,Msi1.description Parent Part description,Msi1.item_type Parent Type,Msi1.inventory_item_status_code The parent code State,Msi2.segment1 Sub-piece

? Setting up SQL Plan management? Set up various SQL plan management scenarios SQL Plan Management: Overview ? SQL Plan management is an automatic control of the evolution of SQL planning. The optimizer can automatically manage the SQL

According to development feedback, the recent daily 7:30 app will alert, the app's log shows that the database connection pool is full, and the new connection is rejected.First, I did the ash report (Reporting interval: 7:25 ~ 7:35), and the wait

Case: Rename a data file after doing incomplete recoverysql>startup mount;//boot to Mount stateSql> Show parameter Control_files//view location information for control filesNAME TYPE VALUE------------------------------------ ----------- -------------

Oracle hit 11.2.0.3.8 patch under Solaris x86-64:Correct steps:1.bug6880880, Opatch's patch2.bug16902043,11.2.0.3.8 PatchFeeling is to practice ah look at easy things also twists--like Opatch version of the issue in the installation of 11.2.0.3.8

Oracle software itself is free, so anyone can download and install Oracle's database software from Oracle's official website, at a charge of license, which is software licensing, and if the database is for commercial use, it is necessary to purchase

TO_DATE format (take time: 13:45:25 as an example) 1. Date and character conversion function usage (to_date, to_char) Copy codeThe Code is as follows:Select to_char (sysdate, 'yyyy-mm-dd hh24: mi: ss') as nowTime from dual; // convert the date to a

The following articles mainly introduce how to automatically back up Oracle databases under UNIX. The following describes the specific solutions, such as tape backup and remote backup, I hope this will help you in your future studies. The following

In the past few years, when Oracle databases abandoned the relevant client OracleForms, some of the built-in functions that subsequently disappeared were about the function (alert message function) passing parameters. If you handle errors or missing

The following articles mainly introduce several faster methods to diagnose common Oracle problems. The following describes the specific solution of Oracle troubleshooting methods, I hope it will be helpful for your future study. The following is a

Introduction: Oracle DatabaseIt is widely used in various fields of society, especially in the Client/Server mode. However, application developers often encounterSystem PerformanceAs the data volume increases significantly, to solve this problem,

Introduction: Oracle DatabaseThere is no constraint. Oracle databases must comply with certain rules. As we all know, few of us work in isolation; most PL/SQL development work is carried out in a relatively large organization. But we basically work

Pl/SQL programming data type in Oracle pl Programming Data Type: www.2cto.com 1. scalar type (scalar) 2. composite 3. reference Type 4.lob( large object) -------------------------------------------------------------- case 1 of defining a scalar.

Oracle trigger 2-DML trigger DML trigger is the most common trigger type, developers use more, while other types of triggers are mainly used for database management or audit, while DBA uses more. 1. Introduction to DML triggers: BEFORE triggers are

[Oracle] the SQL code of the insert into select, select into, and update select statements in SQL -- table1 is required -- join subquery conditions can be written after where, you can also ignore insert into table1 t1 (id, name) select id, name from

Oracle uses the TRANSLATE function to replace one character in a string. How can I replace (12345, 1234, 56789) with '192*12345 '? First, replace: ChenZw> select replace ('(12345 )',',','*'),'(', ''''), ')', ''') from dual; REPLACE (RE --------------

Oracle ORION: Storage System Performance Testing Tool (I) defines ORION (Oracle I/O Calibration Tool) as an Oracle Tool for testing storage system performance bottlenecks because ORION is an independent Tool, it is very easy for users to create and

The paging query method for Oracle, SQL, and DB2 is different from that for paging query statements in Oracle and SQL, the following describes the differences between DB2 paging query and paging query in other databases. Oracle paging query syntax: 1

Oracle trim does not drop white space charactersProblem Background:A business registration number is a normal problem that trim can solve, but in this case, trim is different from what we see with the naked eye, that is, there is an extra