Oracle

  An error occurred while connecting to Oracle today, saying that the Oracle URL is invalid. The Oracle Instance name is depressing because it was not completed during installation. Flowers don't bloom with heart, and you don't have the intention

A horizontal table is a common table creation method. For example, a table has the following structure:Primary Key, Field 1, Field 2, Field 3...If it becomes a vertical table, the table structure is:Primary Key, field code, and field value.The field

· Oracle10g grid infrastructure:Grid computing provides an adaptive software infrastructure that effectively leverages low-cost servers and modular storage. By adding a small number of small servers to scale out, you can achieve high performance and

After installing Oracle, I was very excited to enter the Oracle database on the shell interface.However, when the input command is too successful, the backspace is difficult to use. If you press the backspace key, something like ^] is displayed. The

To make the memo field value in Table B equal to the name value of the corresponding id in TableTable a: id, name1 Wang2 Li3Table B: id, ClientName123(Ms SQL Server) Statement:SQL codeUpdate B set ClientName = a. name from a, B where a. id = B.

After the database is created, it is not in archive mode by default. To use RMAN for hot backup, you need to manually switch the database to archive mode. Generally, switching the archive mode is performed when the database is in the mount exclusive

  The first two chapters mainly introduce how to set up iSCSI storage in Openfiler and how to mount two Linux iscsi devices. This chapter is about the configuration of Oracle ASM and the installation of clusterware.The hosts file of my linux host is

1. GLOBAL_DBNAME and SID_NAME In the listener file may not match the Instance name. After modification, restart listener.2. The value of processes in VPC mode is too small. You can solve this problem by using the following methods:1. cmd2. sqlplus3.

All writtenCreate type num_varray as varray (10) OF VARCHAR2 (12)/Create table varray_table (col1 num_varray );Insert into varray_table VALUES (num_varray (' ', 'abc ')); Select * from varray_table; */ Import java. SQL .*;Import java. math .*;Import

Oracl Database Management Information Displays Oracle sga information: SQL> show sga Total System Global Area 105978600 bytesFixed Size 453352 bytesVariable Size 50331648 bytesDatabase Buffers 54525952 bytesRedo Buffers 667648 bytesSQL> Fixed Size:

[Oracle] SQL * Loader detailed tutorial (1)-Overview SQL * Loader principle SQL * Loader is a tool provided by Oracle for data loading, it is suitable for business analysis databases (data warehouses) and can process flat files in multiple formats.

ORA-12514, ORA-00119, ORA-00132 solve today when using pl/SQL link oracle encountered a little trouble, mainly because of oracle listening comprehension, here to record the problem encountered, in fact, the real principles still need to be

The distinct keyword of the SQL distinct statement is used to filter out redundant duplicate records and retain only one record, but it is often used to return the number of records that are not repeated, instead of using it to return all non-record

[Oracle] explore partition 2-partition index [Oracle] explore one of the partitions-partition pruning http://www.bkjia.com/database/201308/237367.html may be the same for many beginners and I thought at first as long as the index created on the

Skills for oracle grid infrastructure clusterware The article records some skills for oracle crs. oracle version 11.2.0.1 To find out cluster and daemon status [sql] su - grid $GRID_HOME/bin/crsctl check crs CRS-4638: Oracle High Availability

The three methods for inserting special characters: & and 'in Oracle encountered a problem when importing a batch of data to Oracle today: Toad prompts to assign a value to a custom variable AMP, at the beginning, I was wondering how data is a

There was a problem with the statistics of Oracle operators and null values. The situation is as follows: Select id, name, addr from table where addr <> 'shanghai ';  When this statement is executed, the returned data volume is very small. Then,

Delete a data file accidentally. delete a data file in non-archive mode. In order to minimize the risk, force open the database. We first delete a data file, and now open the database [html] SQL> shutdown abort; ORACLE instance shut down. SQL>

The use of PLSQL set types is summarized in pl SQL. collection is an object composed of a group of ordered elements. The types of these elements must be consistent. Pl SQL divides collection into three types: Associative arrays (also called index-by

To modify the Data Type of a table field in ORACLE, you need to use a backup field to change the table as follows: Alter table tablename alter column colname newDataType  For example: Alter table mytable alter column mycol1 int default 0  Later,