Oracle

Stored procedure: A program that changes the state of a database object and can contain one or more behaviors, often by processing a record of one table and then putting it in another table. 1. Basic grammar: CREATE [OR REPLACE] PROCEDURE

An error occurred while installing the Oracle 10g database, previously installed on the Windows7, and now share the solutions and reasons for the problem. Installation behavior: 1. Install the default path that is different from before. Formerly:

First of all, you should understand that the object of the flashback deletion is simply a table, it allows you to restore the previously deleted table to the state before it was deleted, as well as to restore all indexes and any permissions and

To use a trigger: 　　 Drop sequence users_tb_seq; Create sequence Users_tb_seq MinValue 1 maxvalue 99999 Increment by 1 Start with 1; Create or Replace Trigger Users_tb_tri Before insert on users For each row Begin

Basic rules A. In the SPFile file, all parameters are optional, that is, you only need to list those parameters that need to be modified in the initialization parameter file, others to keep the default values. The B.spfile file can contain only

To import the actual application data into the Oracle database tutorial, first open the Access database, select the table you want to import, and overwrite the table name with the individual column names (the table name and the column name will be

Create or replace view V_wtk_all as Select a.ID, O.short as Finddeptname, u.realname as Findusername, f.name as Findway, O1.short as Problematdeptname, Z.name as Szzz, A.yhnr, s.name as Sszy, k.name as kind, w.name as WHHG, A.zgcs, A.ZGFZR,

Hints is a mechanism provided by Oracle to tell the optimizer to generate an execution plan in the way we tell it. We can use hints to achieve: 1 The type of optimizer used 2 The optimization goal based on the cost of the optimizer is All_rows or

Oracle Common link string format:Jdbc:oracle:thin:@//:/Jdbc:oracle:thin:@::Jdbc:oracle:thin:@How to query SIDs under Linux:In the case of configuring an Oracle environment variable, you can use the Echo $ORACLE _sid if you are not able to query

1. Add a column:Alter table name add column name varchar2 (10);2. Modify a column:　　Alter Table name modify column name varchar2 (20);3. Delete a column:　　Alter table name drop column name ;Here are a few places to note, first, add and modify the

There are two simple examples to illustrate the efficiency issues of "exists" and "in"1) SELECT * from T1 where exists (select 1 from T2 where t1.a=t2.a);T1 When the amount of data is small and the amount of T2 data is very large,whent1 ,1)

First step: Create a self-growing sequenceCREATE SEQUENCE zh_alarm_info_seq--Auto-Grow columnINCREMENT by 1--add a few each timeStart with 1-counting starting from 1Nomaxvalue--Do not set the maximum valueNocycle--keep accumulating, not

Javax. management. malformedObjectNameException: Invalid character ''in value part of property found that it was originally the cause of the ojdbc6.jar package. On my machine, I used the 11g 11.1.0.6 driver, so I changed the driver,SolutionReplace

Asp tutorial. net connecting to oracleThe code in the button is as follows:String constr = system. configuration. configurationmanager. apps tutorial ettings ["connectionstring"]. tostring ();Oracleconnection conn = new oracleconnection (constr

I. Query recently executed SQL statementsSelect SQL _text, last_load_time from v $ SQL order by last_load_time desc; SELECT SQL _text, last_load_time FROM v $ SQL WHERE last_load_time is not null and SQL _text like 'Select % 'ORDER BY last_load_time

Not long ago a customer's core database (10.2.0.4.12), it is said that each interval must be restarted, because the ORA-04031 error will be reported. The query found that the shared pool looked like 5 GB. In fact, the ges resource consumed almost 3.5

The concept of a partitioned table is simply as follows: the data in the original table is stored in a tablespace. After a partitioned table is used, the table data is stored in multiple tablespaces.PS: a tablespace is a logical concept that

  String ConnectionString = "user id = ordtrc; pwd = ordtrc; data source =" FRAME2DB "; persist security info = False;"; // write a connection stringOracleConnection conn = new OracleConnection (ConnectionString); // create a new

A text box is provided to allow users to enter a large number of values and save them to the Oracle database.To save a large amount of data, set the field type to blob.Similar help on the network is too complicated. It is found that it is relatively