Oracle

Char fixed length character fields, up to 2 000 bytes The fixed-length character field of the nchar multi-byte character set. The length varies with the character set. It can contain a maximum of or characters. Varchar2 can contain up to

There are four functions that support regular expressions in Oracle: 1. regexp_like: similar to like 2. regexp_instr: similar to instr 3, regexp_substr: similar to substr 4. regexp_replace: similar to replace functions, regexp_replace is

Solutions for navicat connection to Oracle reporting ORA-12737 set chs16gbk errorsHttp://hi.baidu.com/leejun_2005/item/c4a4832247807f142a0f1c5f{Core steps{Download instantclient-basic-nt-11.2.0.3.0.zipHttp://download.oracle.com/otn/nt/instantclient/1

Previous http://www.cnblogs.com/suyuan/archive/2008/12/02/1346219.html versions Sysman is used to connect to the Oracle database. data. if the Oracle client is not installed, the connection will fail, and the large Oracle client will be discouraged,

OK. when you connect to Oracle Data, you are always prompted to support the Oracle client, and an Oracle client with a compression format of at least 450 MB is very inconvenient for us to deploy the project. I can see on the Internet that a friend

First, search for the following files on the machine where the Oracle server is installed,OCI. dllOcijdbc10.dllOciw32.dllOrannzsbb10.dllOraocci10.dllOraociei10.dllSqlnet. oraTnsnames. oraClasses12.jarOjdbc14.jarMake it into a compressed file and

Reference: For example, an External table is created here, as shown in: Comparison: 1. In SQL, we can only use the case functions,CodeAnd the results are as follows: Select name,Case subjectWhen 'China' then 1When 'mate' then 2When

Solution for Oracle10g "No listener" 1. Follow the net configuration assistant prompt in Oracle10g to create a listener. Note the prompt "whether to configure another listener ". Program? "Select" no ", and then" Next ". Remember to click"

This article is about all the previous functions Article Summary: I. Statistics: Sum () Over ( [ Partition ]   [ Order ] ) Sum () Over ( [ Partition ]   [ Order ] Rows Between Preceding And Following) Sum () Over ( [

What is the difference between a temporary table and a formal table?What is the role of a temporary table?How can I create a temporary table?     Temporary tables are generally stored in temporary tablespaces.There are two types:

There are two simple examples to illustrate the efficiency of "exists" and "in ". 1) Select * from T1 where exists (select * From T2 where t1.a = t2.a ); Small Data size of T1 and large data size of T2, t1 2) Select * from T1 where t1.a in

Previously, SQL server used to copy table structures and data using select * into tablename1 from tablename2 where. When using Oracle today, You need to copy the table structure and data and write the same statement without thinking about it. The

Basic Oracle Spatial operations Oracle Spatial mainly usesMetadata table and Spatial Data Field(Sdo_geometry field) and spatial index to manage spatial data, and provide a seriesSpatial Query and Spatial AnalysisOfProgramPackage, allowing users

Spatial indexes in Oracle Spatial Oracle Spatial performs R-tree indexes on spatial data. The spatial index metadata of each spatial layer can be found in the user_sdo_index_metadata view. The specific index data is stored in the table starting

When viewing the database session in the OEM, it takes more than 10 seconds to find the SQL statement for a session Execute SQL in pl SQL and press F5 to view the SQL plan, and find that the index is called elsewhere, View Oracle statistics

In fact, the main problem of connecting to the database in Java development is not how to writeCode, But find the driver package. Because there are too many JDBC driver packages and many names, some of them still need to be installed on the client

---- Three default users 1 Sys change_on_install[As sysdba] //Highest System Administrator2 System manage//Local administrator3 Scott Tiger//Common User ---- Create a user Create UserLeap identifiedBy 1234 //Set the leap user password to 1234.

Overview: profile is a set of commands for password and resource restrictions. When a database is created, Oracle automatically creates a profile named default. When the created user does not specify the profile option, oracle will automatically

Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/--> # Region Extract Function String soraconnection = "Data Source = sh2.chs. cyw.rik. com; persist Security info = true; user id = Doc;

Method 1: variables with the same table Type Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/--> Create or replace function f_get_cust_name (v_no in customer. No % Type, v_compno in customer.