Oracle

After finishing the project yesterday to test a test, said that the paging query does not seem to work, turned to page 4th, after the results of the data are the same.At that time I felt very puzzled, impossible ah, paging components should be good,

[SQL] Copy Code code as follows: CREATE TABLE Wlbtest1 ( Username VARCHAR2 (2), DeptID number ); CREATE TABLE Wlbtest2 ( Deptname VARCHAR2 (10), DeptID number ); INSERT into wlbtest1 values (' a ', 1); INSERT into wlbtest1 values ('

Modifying the project involves modifications to many of the tables in Oracle (including adding, removing fields, modifying annotations, and so on). Because the start did not record, causing on the test machine, forget the specific changes to the

Linux system Oracle will often appear garbled, whether it is installed or used in the process will appear in Chinese garbled. This is because some fonts are missing from the Linux system, and as long as these fonts are installed, it solves the

1. The origin of the problemWhen the Oracle database field value is less than 1 decimal, processing with the char type loses 0 of the preceding decimal pointFor example, 0.35 becomes. 35 2. Solution: Format digital display with To_char

Of course, this small problem is difficult to fail US programmers, "max+1 ah", some people would say such a way. Yes, this approach is easier to achieve. Of course, you may also say that the most SQL way is to use the identity column, the increase

One, close the database [Oracle@rhel5] $sqlplus/as sysdba Sql>shutdown immediate; Second, close the monitoring [Oracle@rhel5] $lsnrctl stop Iii. deletion of Oracle_base I'm switching to root here. [Root@rhel5] #rm-rf/s01 Iii. Clearance of

Session: In a computer, especially in a network application, called a conversation. Session: In computer terminology, session refers to the time interval between an end user communicating with an interactive system, usually the time elapsed between

In the work you need to import data from table Gis_weichai_data_1s in one database into a table gis_weichai_data_1s in another database, the database servers are remote ! My implementation is to operate two remote servers locally using PL/SQL, which

SQL1: Copy Code code as follows: --1, viewing the name and size of the table space SELECT T.tablespace_name, round (SUM (Bytes/1024 * 1024)), 0 ts_size From Dba_tablespaces T, Dba_data_files D WHERE T.tablespace_name =

Server is Windows Server 2003, after the Oracle client is installed normally, the Chinese are found when inserting data. Abnormal: In Pll/sql, select Userenv (' LANGUAGE ') from Dual is entered and the result is american_america. Us7ascii, Under [

SQL code Copy Code code as follows: Select COUNT (*) from user_objects where Object_name=upper (P_table_name); Select COUNT (*) from User_tables where Table_name=upper (P_table_name); Create or replace procedure P_drop_table_if_exist_

/* There are four main functions in Oracle that support regular expressions:1,regexp_like: Similar to like function2,REGEXP_INSTR: Similar to INSTR function3,REGEXP_SUBSTR: Similar to SUBSTR function4,regexp_replace: Similar to REPLACE functionThey

One thing that has been going on for two weeks is the migration of databases. Do not feel this is a very easy thing to do, but wait until the real to do to achieve the time, their dumbfounded. This tangle,First of all, here's the problem:1. Table

Today we have a statistic that asks for all the days of the month, and if the result of one day is 0, it needs to be displayed, namely: Date                    number of transactions    transaction amount 2009-4-01            1              Ten 20

A cluster is actually a set of tables, consisting of a set of tables that share the same blocks of data, combining tables that are often used together to cluster together to increase processing efficiency; A table in a cluster is called a cluster

In Oracle, indexes are basically divided into the following categories: B*tree Index, reverse index, descending index, bitmap index, function index, Intermedia Full-text index, etc., most commonly used are B*tree index and bitmap index. (1),

First, the foreword:After a period of storage process development, write down some of the development of the summary and experience to share with you, hope for everyone's benefit. second, suitable for the reader object:Database development

In an Oracle query, use Oracle's Decode (field, ' field value ', number) if there is no sort, but you want to have the information of a particular value in a column go ahead. If you want to have name= ' John ' results in front of all the data from

Before Oracle9i, Chinese is sorted according to binary encoding. In oracle9i, according to pinyin, radical, stroke sorting function.1, set the Nls_sort parameter valueSchinese_radical_m sorted by radical (first order), stroke (second order) schinese_