oracle select from table

CREATE TABLE as SELECT * FROM and insert to select from two table copy statement differences[SQL]View PlainCopy Create table targer_table as select * from source_table INSERT INTO target_table (column1,column2) select Column1,column2

Temporary tables: Like normal tables, there is a structure, but the management of the data is not the same, the temporary table stores the transaction or the intermediate result set of the session, the data saved in the temporary table is only

Oracle CBO RBO Detailed url:http://blog.163.com/love-love-l/blog/static/21078304201010175035270/ Http://blog.csdn.net/cnham/archive/2010/04/13/5482318.aspx First part What is Table analysis. Simply put, it is the information that collects tables

When importing data from IMP in Oracle, hybriddb for MySQL prompts that the character set is inconsistent. The imp import and exp export functions of Oracle are often used in the production environment for data migration. The character set is

Reprinted from http://blog.csdn.net/cuker919/article/details/8514253Select Segment_name, bytes as sizeFrom User_segmentswhere Segment_type = ' TABLE ' and segment_name in (' view_jlzdh_mp_dl_day_01 ', ' view_jlzdh_mp_dl_day_02 ', ' View_jlzdh_mp_ Dl_

One. Query article 1. Query Oracle Table space usage Select b.file_id file ID, B.tablespace_name table Space, B.file_name Physical file name, The total number of bytes b.bytes, (B.bytes-sum (NVL (a.bytes,0))) has been used, Sum (NVL (a.bytes,0))

Over the past decade, Oracle has become one of the most professional databases in the world. For IT professionals, it is important to ensure that Oracle's powerful features are used to improve the productivity of their companies. One of the most

In the past decade, Oracle has become one of the world's most professional databases. For IT experts, it is to ensure that their company's productivity is improved by leveraging the powerful features of oracle. One of the most effective methods is

It takes only 6 minutes to scan a 166G table from an oracle full table, and oracle166g How can I maximize the cpu usage? How to quickly scan a large table. If a large table has a primary key, count (*) takes the primary key. oracle only needs to

Note: This article declined to reprint.1 managing table spaces in a CDBCDB table space management and NON-CDB table space management, CDB also has an instance, specified at the time of installation.-- To view a table space:Sql> Select instance_name