db2 table size

Tags: based on body allows DIV to use Oracle database to insert int SQLASC and DESCIndicate ascending and descending, respectivelySELECT * FROM tablename ORDER BY id DESC: According to the ID field in descending order, from big to smallSELECT * FROM tablename ORDER by ID ASC: According to the ID field in ascending order, from small to largeClone tableThe methods for cloning tables in the DB2 database are as followsClone table:CREATE

When using temporary tables in the DB2 database, you need to pay attention to some issues. This article introduces you to six of the key issues for your reference and hopes to help you. Notes for using temporary DB2 tables: 1. The Temporary Table of DB2 needs to be created using the command Declare Temporary

In fact, the DB2 table is compressed by viewing the entire table, finding duplicate characters and strings, and storing those characters and strings in a compression dictionary, then, an alternative symbol of the corresponding data string stored in the dictionary is used to represent the actual data, thus compressing the data. A compressed Attribute

The DB2 big data table data deletion method is slow and unacceptable when the table data volume is deleted from table_name in millions. In addition, delete is more unacceptable when deleting multiple tables. Find the method and find it very fast. The procedure is as follows: www.2cto.com (1). Create a new file named [empty. del] on drive C, which is an empty file

 DB2 The explain table for the SQL execution plan does not exist by default, open DB2 command line, CD to the following directory C:\Program Files (x86) \ibm\sqllib\misc>lsDb2autobackuppolicy.xsd db2evmonpkgcache.xsd db2monroutines.xsd db2schemaannotation.xsl Db2adminV8.exe Db2uext2.v2Db2autoreorgpolicy.xsd db2evmonuow.xsd db2optprofile.xsd EXPLAIN. DDL DB2AUD

Tags: Java DB2 shell ExportThis article calls the shell script through Java code and passes in the parameter implementation DB2 the database table exports to the file, the code is as follows:importjava.io.file;importjava.io.ioexception;importjava.io.inputstreamreader;import java.io.linenumberreader;importjava.util.hashmap;importorg.slf4j.logger;import Org.slf4j.l

The table size has two meanings. One is the number of physical spaces allocated to a table, regardless of whether the space is used or not. You can query the number of bytes as follows:SELECT segment_name, BYTES FROM user_segments WHERE segment_type = 'table '; Space actually used by another

"Guide" to give a simple example, encryption, decryption passwd is set global, using the DB2 database encryption function Encrypt,decrypt_char implementation. Cases: 1. C:\>db2 create table encode_demo(col1 varchar(100) for bit data) //字段col1数据按二进制存放 DB20000I　SQL 命令成功完成。 2. C:\>db2 set encryption password = 'loveunix

This document introduces two common methods for importing and exporting table structures in the DB2 database. Method 1 In the object View window of the control center, select the data table of the table structure to be exported, press Ctrl or Shift to select multiple data tables, right click, and choose-> Generate DD

Tags: SQL data where table nbsp many sum catA lot of information on the Internet, and finally found a viable, share the following:Database size query:Select Concat (Round (sum (data_length/1024/1024), 2), ' M ') from INFORMATION_SCHEMA. TABLES where table_schema= ' database name ';Table size query:SELECT concat (Round

This article will introduce you to the description of how to collect statistics on various types of tables in the DB2 database for your reference. If you are interested in this, please take a look and I believe it will help you. DB2 provides three command tools to reorganize and analyze table data:REORGCHKREORGRUNSTAT The statistical information of objects is c

Enable automatic table and index reassembly DB2 V9 can be automatically reorganized on tables and so on. It is critical that you have well-organized table data for efficient data access and optimal workload performance. After many changes have been made to the table data, logically contiguous data may reside on discon

Example: 1.C: \> db2 create table encode_demo (col1 varchar (100) for bit data)// Field col1 data is stored in binary formatThe DB20000I SQL command is successfully completed.2.C: \> db2 set encryption password = 'loveunix'// Set the encrypted and decrypted passwdThe DB20000I SQL command is successfully completed.3.C: \>

Mobile design draft font-size and page font-size correspondence tableDesigners to come over the design manuscript font-size various sizes, 22/24/26/28/32/36 ..., brother is really drunkA certain month a certain day elder brother finally suddenly hair whim, conversion out the following table, issued to designers let the

Exporting a table from DB2 there's a simple way to do this, and a long time programmer has been exposed to it. Previously encountered this problem from the Internet can not find the right answer, today to share the hope to help the needs of the peers.Because I don't have a db2 at home. So take the MySQL interface as an example. The operation is simple and has no

Label:1: Delete field non-empty propertyALTER TABLE XXX ALTER COLUMN XXX drop NOT NULLThis feature requires a version of DB2 9.0 or more2: Add field non-empty propertyALTER TABLE XXX ALTER COLUMN XXX set NOT NULL3: Add a new fieldALTER TABLE XXX add column XXXX varchar (100)4: Delete a fieldALTER

#查看每个数据库占用的空间:Select Table_schema "Database Name", sum (data_length + index_length)/1024/1024 "database Size in MB" from Informatio N_schema. TABLES GROUP by Table_schema;#查看数据库下每个表和索引占用的空间:Select table_name as "Tables", Round (((data_length + index_length)/1024/1024), 2) "Size in MB"From INFORMATION_SCHEMA. TABLESWHERE table_schema = "MySQL"ORDER by (data_length + index_length) DESC;Space occupied by #查看排名

Label:Now there is a row of data, to be copied to multiple lines, each row only two field values are different, DB2 no SQL Server top keyword, the only want to copy a few times, and then update the data, found no.Then think of a temporary create a table B, insert this row of data, and then constantly modify B and then insert a.DB2 Copy Table structure:CREATE

I. Modifying table space size Solution to the above problem: by increasing the table space can be resolved as follows:SQL code log in with a DBA user Sqlplus/ as SYSDBA; execute the following command: SQL > ALTER tablespace SYSTEM ADD datafile '/u01/app/oracle/oradata/test/system02.dbf ' SIZE 20480M

DB2 database system to build the table, there will inevitably be the data in the table to clear the demand, this article will introduce you to the DB2 database of four methods of data deletion, for your reference, you can choose according to the actual situation, hope to be helpful.1. Use the DELETE statement, which is