Oracle

AUTOTRACE for Oracle performance analysis tools is one of the most common performance analysis tools. It is used to view the execution process and resource consumption of SQL statements. The SP2-0618: The session identifier cannot be found. Enable

When IMP data is imported to the specified tablespace through imp, the data is imported to the tablespace corresponding to the dmp file generated by exp by default. For example, if you use orcl_dev user and exp data and orcl_test user imp data, the

Automatic Generation of document numbers based on format strings (ORACLE version) This code automatically generates document numbers for strings with specific keywords. Www.2cto.com @ SJ --- the format string (which is the keyword meaning below) "%

How to enable and Block Database Oracle archive mode Oracle training: Oracle archive mode the following articles mainly describe how to correctly start or block Oracle archive mode, we all know that Oracle databases run in two modes. Oracle archive

Oracle entry to master Part 3-query 1 Table query (1) introduction to basic oracle Table query www.2cto.com in our tutorial, we use several tables (emp, dept) Existing by scott) it demonstrates how to use the select statement. The select statement

[Oracle] Tree Structure Query [SQL] -- tree structure query in oracle is actually a sequential traversal-displays the tree with KING as the root node, start with defines the START Node SELECT * FROM emp a start WITH. empno = 7839 connect by prior.

Oracle uses recursive performance prompts that when you use start with connect by nocycle prior for Recursive data search, www.2cto.com, then the performance of the following two sections of code must be significantly different. Please note that the

Java code for data migration between different oracle tablespaces -- migrate data in the database testdb and the username testuser's default (users) tablespace to the tablespace (newtablespace) -- 1. log on to the testdb database as a system user,

Oracle knowledge-tracking SQL statements 1. First, find the session information SID of a machine you want to track, SERIAL # select SID, SERIAL # from v $ session where lower (terminal) like '% yf07 %'; www.2cto.com 2. Enable tracking: exec

In the oracle database, the insert and update operations on the data table cannot be performed in the oracle database, and the data table cannot execute the update statement because the data table is locked by other users. The solution is as follows:

Archiving log files1. Change the Database Log mode from non-archive to archiveStartup mountAlter database archivelog;Www.2cto.com2. View v $ log and v $ logfileDesc v $ log, desc v $ logfile Group # indicates the Group, members indicates the number

In linux, the oracle netca Listener Configuration listener starts and stops: lsnrctl start -- start lsnrctl stop -- stop lsnrctl status -- view the status www.2cto.com netca Listener Configuration [oracle @ dev root] $ cd/u01/app/oracle/product/11.2.

Oracle calculates the cumulative cross-day time dimension TABLE from the beginning of the year to the current DATE: www.2cto.com SQL code CREATE TABLE D_TIME (D_DAY DATE NOT NULL, C_DAY_ID VARCHAR2 (8) NOT NULL, C_MONTH_ID VARCHAR2 (8) not null,

A Method of dynamically initializing numbers often needs to initialize some data, and some regular numbers need to be filled according to the actual situation, such as fixed length and several parts, the most common example is the first digit,

ORA-14300: partition key maps to a partition outside maximum pemitted number of partitions oracle version: 11.2.0.2 ERROR Description: an ERROR occurs when a record is inserted into an automatic partition table: partition key maps to a partition

Solution: Oracle exception ORA-01861: literal does not match format string (string format mismatch) today, when writing a stored procedure, it always reports an error. For future reference. Error: Oracle exception ORA-01861: literal does not match

The Oracle keyword rownum uses Rownum, which is a pseudo column provided by oracle. We use a lot of data during paging. If rownum is improperly used, it will often be crazy. Assume that the table structure is as follows: www.2cto.com tid tname ttype5

Oralce comma split into multiple rows method 1 select. *, REGEXP_SUBSTR (. rolecode, '[^,] +', 1, l) AS rolecode from p_user a, (select level l from dual connect by level = len THEN EXIT; END IF; ELSE str: = SUBSTR (p_str, I, j-I); I: = j + len1;

Maybe you don't know about the ORACLE secret series-Oracle 11g introduces Case-sensitive passwords for database authentication. along with this if you wish to change the password (temporarily) and reset it back to old, you will find that password

The process of restoring the Oracle file to an instance 1. applicable Conditions: www.2cto.com 1. data files with the original Instance (the best full oracle path), such as oracle cold Backup recovery after the system is reinstalled or on other