informix systables

Informix is a large database management system with advanced technology, performance and reliability, widely used in a wide range of applications worldwide, including government, financial insurance, postal telecommunications, manufacturing and

In the development of large-scale projects, a project team usually in a small simulation environment for the initial development, after the initial stability of the system, then move the development environment to the new system, and finally the old

Improve concurrency and locks so that more users can access data faster.From the Chinese version of IBM database magazine. A very important but often overlooked Performance Tuning step is to check how Informix Dynamic Server (IDS) handles

Improve concurrency and locks, allowing more users to access data faster. From IBM Database Magazine Chinese version. One important, but often overlooked, performance tuning step is to check how Informix Dynamic Server (IDS) handles locks and

How do I use the Dbschema tool to unload the structure of the database For example: 珃? ? T? 1 Export all table structures in the database to the file Db.sql 剉 Zeng M Ying 孃? $>dbschema-d your_database-t all Db.sql Q. $ puppets??? 2 export all

Function Detailed usage of Informix SQL functions One, internal functions 1. Internal aggregate function 1) Count (*) returns the number of rows 2 count (DISTINCT colname) returns the number of unique values in the specified column 3) SUM

--field and field type codes in a tableSELECT C.colname, C.coltype,t.owner from syscolumns C, systables t WHERE c.tabid = t.tabid and t.tabname = ' Dm_plc_policy '--View Database temp table space usageSelect Pagesize,chksize,nfree from

Make full use of the database optimizer through the UPDATE STATISTICS statement in Ibm®informix®dynamic Server (IDS). Read the brief description of this SQL statement in this article to learn how to use it to solve a variety of different problems.

I. Intrinsic functions1. Internal aggregate function1) Count (*) returns the number of rows2) Count (DISTINCT colname) returns the number of unique values in the specified column3) SUM (colname/expression) Returns the value of the specified column

Turn from: http://blog.163.com/hanjh_520/blog/static/2186737220100125245614/ -958 Temp table already exists in session.This statement tries to create a table with the name of is shown, but a temporary table with that name already exists. Only one