Oracle

Oracle's analysis function over and window function eg: Related parsing: Table t_pi_part field id code namevalue 1 222 avalue 2 222 bvalue 3 333 c add Row labels to the same part code, sort www.2cto.com select p. *, row_number () over (partition by

A simple demo of Oracle functions and stored procedures recently used Oracle functions and stored procedures in the project. Previously, Oracle functions and stored procedures were used for database operations using SQL statements. After this stored

After the oracle database is detached, delete the original SID Implementation Method: 1. Start-> Settings-> Control Panel-> Administrative Tools-> stop all Oracle services. 2. Start-> Program-> Oracle-OraHome81-> Oracle Installation Products->

Decompress the cpio file and decompress the cpio file cpio-idmv [file | device] Back up data to a file or device to restore: cpio-icduv

In oracle, row-to-column conversion requires that multiple rows be merged into one row in the project. You can see a data at a Glance (student ID is unique) the original data obtained from www.2cto.com is like this. a B C D name student ID (student

Personal Understanding of Oracle databases, instances, and configuration filesOracle configuration fileThis section describes the network configuration files of Oracle: listener. ora, sqlnet. ora, and tnsnames. ora. They are all stored in the $

Enable the Database flash back function-to close the Database, you need to open the Database to the mount State to enable the flash back function: SQL> shutdown immediate Database closed. database dismounted. ORACLE instance shut down. SQL> show

Oracle date processing -- calculate the year month day select to_char (sysdate, 'yyyymmdd'), sysdate from dual; -- calculate the year month day system yesterday select to_char (sysdate-1, 'yyyymmdd'), sysdate from dual; -- calculate the day before

Weekly work summary-problems caused by left joinToday, a colleague told me that an SQL statement cannot be executed for a long time. How long does it take? She said it was about a day. This is a staggering SQL statement. So I came to SQL and looked

Arcsde post oracle11g error solution environment: oracle11.2.0.3 and oracle10.2.0.1, Arcsde9.3.1 create an AB instance in oracle11.2.0.3, then use Arcsde9.3.1 post oracle11.2.0.3 to create the sde configuration and report an error during the post

Tips for configuring Oracle sqldev shortcutsWell, I have not fully studied sqldev, but it is not very convenient to use in a few places. I found that I can modify the shortcut key to correct it.1. Code intelligent completion promptAll the shoes that

Oracle job is required to regularly execute the project. oracle job is used. I tried it myself and solved some problems. I published the job I wrote and kept a record. begin sys. dbms_job.change (job => 22, what => 'Clare result1 varchar2 (200);

SQL Group by summary for Oracle databasesPrefaceAs mentioned above, grouping Functions Act on a group of records. What can this group of records be generated? ImpossibleThey are all in the form of a whole table. This requires the Group by

Let's talk about fine-grained audit (DBMS_FGA) 1. the DBMS_FGA package is effective in the cost-based optimizer. unnecessary audit records may be generated in the rule-based optimizer. (Because audit monitoring can occur before row filtering)

Pre-fabricated users in oracle are enabledSome ORACLE users are premade and useful, but they are locked during initialization. We need to manually enable it.SQL * Plus: Release 10.2.0.1.0-Production on Tuesday April 9 20:02:02 2013Copyright (c) 1982,

Description by Source when the Oracle client is garbled, the developer will inevitably re-build the database environment when deploying a new runtime environment. However, I found that when many colleagues execute the database creation script, the

To use the UTL_FILE class to export multiple files: To export ALL_OBJECTS according to 3000 files, for example, 6001 records, you should export three files, the first and second files are 3000, And the last file should be 1. The following example

Oracle database stored procedures and stored functions are stored in the database for all user programs to call the subroutine called stored procedures, stored functions. The stored procedure does not return values. Stored functions return values to

Oracle experience 3 -- Multi-Table query @ grouping query @ subquery explanation and case analysis @ classic exercise questions1. Cartesian set and cross setDescartes are generated under the following conditions: the join condition is omitted, the

Setting oracle automatic memory management to enable oracle automatic memory management requires shutdown, restart 1. determine the sga pga memory size: show parameter target 2. determine the maximum pga usage since the database is started: select