Oracle

"Shared sql:1. Unified writing Style2. Using bound variables"To find the SQL statement that is not shared:Look for SQL statements with smaller executions in v$sql to see if these SQL statements are executed frequently.Select Sql_fulltext from V$sql

The composition of the 1.shared pool (shared pool)3 Block Area: Free cache, library cache, row cacheFree Cache: Idle spaceLibrary cache: Main cache SQL statements and execution plans for SQL statementsRow cache: Data dictionary cacheSELECT * from

1. Order of execution:Client input SQL statementSQL statements reach the DB instance over the networkAfter the server porcess receives the SQL statementA. Parse the SQL statement into an execution plan before executingB, parsing: Consume a lot of

The bulk collect feature has been introduced for the first time in Oracle8i, which allows us to use batch queries in PL/SQL, which in some cases can significantly improve query efficiency. With bulk collect, query results can be loaded into

One, sub-typeThis type is the simplest, similar type of an alias, mainly for some commonly used types of simplification, it is based on a primitive type. Such as:Some applications often use some currency types: number (16,2). If you define this type

CREATE OR REPLACE FUNCTION f_pinyin (p_name in VARCHAR2) RETURN VARCHAR2 asV_compare VARCHAR2 (100);V_return VARCHAR2 (4000);FUNCTION F_nlssort (P_word in VARCHAR2) RETURN VARCHAR2 asBEGINRETURN nlssort (P_word, ' nls_sort=schinese_pinyin_m

First of all, the Oracle 9i added a new system comes with the sorting function1. Sort by first letterNew in oracle9i, according to pinyin, radicals, stroke sorting function. Setting the Nls_sort valueSchinese_radical_m Sort by radical (first order),

Problem: An error occurred: Unable to create a trigger on the SYS owned objectSolution:Problem exclusion:Question 1, first of all to know that the start is unable to build on the SYS user, first of all to determine the user is now logged into the

Order form. Same Order ID as order Information table (multiple order information columns)Find out all orders and their information and page them according to the orderSELECT * FROM (Select a. *, (Dense_rank () over (order by ID DESC)) as Numindex

1: Create UserCreate user username identified by password;Note: The password starts with a letter2: Change Passwordyourself: PasswordOthers: Password username (System administrator can change others)3: Delete UserDrop user username [cascade]DBA

Selectsysuser1.* from(Selectsysuser2.*, RowNum rownum_temp from(Selectyycgdmx.id Yycgdmxid, --YYCGDMX.ZBJG, Yycgdmx.jyjg, YYCGDMX.CGL, Yycgdmx.cgje, Yycgdmx.cgzt, (SelectDictinfo.info fromDictinfowhereDictinfo.typecode ='011'and

ORACLE 11GR2 is configured with a domain during installation and will be deleted later. oracle11gr2 Because a security platform is used. Does this platform not support services in oracle? "." This is because oracle was installed and entered into

Solve ORA-00824: cannot set sga_target due to existing, sgatargetToday Linux server machine restarted, Oracle cannot start up, prompt: Solve the ORA-00824: cannot set sga_target due to existing saw a lot of solutions, found below this particularly

Simple Oracle REGEXP_REPLACE function usage REGEXP_REPLACE allows you to search for the function of the string's regular expression mode REPLACE function. By default, This function returns source_char and replace_string to replace each instance in

How to modify the tablespace size in Oracle, and modify the tablespace size in oracle This article describes how to modify the tablespace size in Oracle. We will share this with you for your reference. The details are as follows: 1) view the

ORACLE queries the locked object and ends its session. oracle locks the object. What should I do if I find that a table is locked and I don't know who (or which program) is locked when I use Oracle? Two steps: 1. Find the session ID and serial

Simple usage of substr and instr functions in Oracle, oraclesubstrinstr Simple usage of the substr function in Oracle Substr (string, truncation start position, truncation length) // returns the truncated word Substr ('Hello world',) // return 'H' *

[Translated from mos] partition index: Global, Local, PrefixedandNon-Prefixed Source: Partitioned Indexes: Global, Local, Prefixed and Non-Prefixed (Documentation ID 69374.1) Applies to: Oracle Database-Enterprise Edition-Version 8.0.3.0 and

I just set up 10.2.0.4RAC. I just set up 10.2.0.4RAC today. I cannot get up after I shut down and restart it. I'm glad to start filling in the problem: [oracle@rac2 ~]$ crs_stat -t -vName Type R/RA F/FT Target State

RHEL5.8 reports a version error when installing Oracle10 RHEL5.8 reports a version error when installing Oracle10. If it is not supported, modify oraparam. ini # RUN_OUICA specifies the batch script name that needs to be run # The script is ouica.