Oracle

ORA-01033: ORACLE initialization or shutdown in progress problem ORA-01033: ORACLE initialization or shutdown in progress solution: Command Line: sqlplus "/as sysdba" entering sqlpluswww.2cto.com SQL> shutdown normalORA-01109: the database has not

The oracle custom function index trap comes from the tip of the iceberg-ORACLE development art conclusion: You must re-build the function index after modifying the function code. Otherwise, oracle will use this function index to query the error

Several useful oracle dba_hist _ * query statements consume the most CPU Of the 10 statements select * from (select s. SQL _ID, sum (s. CPU_TIME_DELTA), sum (s. DISK_READS_DELTA), count (*) from DBA_HIST_SQLSTAT s group by s. SQL _ID order by sum (s.

What is Undo used? Before introducing undo, let's talk about another thing transaction, which is translated into transactions or transactions. We need to apply for many resources in the process of a transaction, and a complicated transaction also

An example is provided to illustrate the function of union all in the database. The present table Aid name1 name21 aa bb2 aa cc3 bb cc4 aa dd ................. www.2cto.com needs to count the number of times each name appears. The expected result is

Query the oracle-locked table and the process of killing the lock table. 1. First, check that the locked table contains too many processes: SELECT substr (v $ lock. sid, 1, 4) "SID", serial #, V $ SESSION. sid, substr (username,) "UserName", substr (

ORACLE 8i, 9i table connection method. Normal equal connections:Select * from a, B where a. id = B. id;This is an internal connection.For external connections:"(+)" Can be used in Oracle, and 9i can use LEFT/RIGHT/full outer join.Left outer join:

How to view the execution plan in the Oracle client 1. run the "explain Plan" Syntax: SQL> Explain plan for www.2cto.com Try this command: SQL> explain plan for select * from mtl_system_items_ B where inventory_item_id = 149 and organization_id = 207

In relational databases, an index is a table-related database structure that enables faster execution of SQL statements corresponding to tables. The index function is equivalent to the book directory. You can quickly find the desired content based

The overview file of Oracle is also called a resource file. It is a concept proposed by Oracle to rationally allocate and use system resources. When a DBA creates a user, Oracle automatically creates an associated default profile for the user. The

The voting algorithm in oracle rac assumes that there are three machines in the RAC cluster: A, B, c a, B, and C. assume that this is A heartbeat line problem, the entire RAC cluster is divided into two partitions, one is only A partition, the other

The oracle 10g client connects to the oracle 9i Database oracle10g client to connect to the oracle9i database. Net Manager Configuration profile: naming method: TNSNAMES service name: Create-next step to page 4th, select the SID (oracle8 or a lower

Many people think that Oracle can easily change the password but cannot change the username. actually, the name can be changed. it is a little troublesome to change. the use of username change is useful in such a scenario. assume that a company has

Oracle collection type description set type 1. usage conditions: a. data in a single row, using scalar variables. B. Single Row and multiple columns of data, usage record [For details, see: Click to open the link http://www.bkjia.com/database/201210/

Oracle Date Field Operations in java oracle operations, Date field is a headache, in fact, a careful study is not difficult to grasp. For example, the table book contains two fields: name varchar2 (20) // book name and buydate Date // purchase Date.

PL/SQL language basics (1) a pl/SQL block consists of up to four different parts. Only one part is indispensable. block: only named blocks are available, that is, the named functions, stored procedures, and other block names. declaration part:

Oracle row migration and row link definition: Row migration: Because of update, the row length, the original block can no longer be placed, the row is moved into the new block, row link: the line is too big at the beginning. For example, if you have

Oracle Database learning-basic structure popularize basic knowledge of oracle. To sum up, oracle is composed of instances and databases. The structure is as follows: www.2cto.com the oracle database consists of instances and databases: * The

For plsql export table structure statements, select tools> export tables to export table structure and data tools> export user objects to export table structure www.2cto.com. You can use tools> export tables to use the intermediate SQL inserts page,

The Truncate and Delete statements in Oracle are described first. The truncate command: www.2cto.com Syntax: truncate table; The data in the table is cleared, and the storage space is released. After the task is run, the task is automatically