Oracle

1. Use the Oracle user to create a script file to start and stop oracle in the bin directory of the Oracle application (for example,/Oracle/product/9.2.0/bin.For exampleStartoracle. bat Echo "Start oracle ......"LSNRCTL startSqlplus/nolog

I. background Structured Query Language (SQL) is a common language used to access relational databases. It is a fourth-generation language (4gl) and features non-procedural execution, you do not need to specify the operator Method and

From: http://www.itpub.net/showthread.php? S = & postid = 8169093 # post8169093 For the rownum problem in Oracle, many documents do not support>, >=, =, between... and. The preceding symbols can only be used (,> =, =, .. and will prompt SQL syntax

method 1 Create or replace procedure demo (salary in number) as cursor_name integer; rows_processed integer; begin cursor_name: = dbms_ SQL .open_cursor; dbms_ SQL .parse (cursor_name, 'delete from EMP where SAL>: x', dbms_ SQL); dbms_ SQL

In the project development process, I encountered the following problem:Use the freetextbox control to input formatted content and save it to the database. However, an error is always reported during insertion: the string is too long.I searched the

Background: Recently, the database server of the company was managed in a unified manner, collect databases distributed across servers to one machine (252) . ip 98 . One of the databases is relatively small, with exp export with imP

Declare   Cursor Cur_m_shohinhotel Is   Select  H. seq, H. usedate,To_char (to_date ( ' 2006/12/12 ' ) + H. usedate -   1 , ' Yyyymmdd ' ) As Useday,H. cyclcd, H. mealtypecd, H. roomcategorycd, H.

Declare Existflag int; Existcolflag int; Begin Select count (1) into existflag from user_tables where table_name = upper ('print _ Bill '); Select count (1) into existcolflag from user_tab_columns where table_name = upper ('print _ Bill ') and

Oracle + SDE data backup and recovery 1. Complete database backupExp System/password @ Sid Full = y file = D: \ system. dmp log = D: \ system. Log2. Data warehouse receiving(A) Delete SDE and SDE user from the databaseDrop user SDE cascade;Drop

Modify the character set of Oracle 10 GB Modify the database character set to zhs16gbk.View server character setsSQL> select * from V $ nls_parameters;Modify:$ Sqlplus/nologSQL> Conn/As sysdbaIf the database server has been started, run shutdown

Self join is a commonly used connection method in SQL statements. Using Self join, you can treat one image of your table as another table, so that you can get some special data. When should we use a self-connection? Let's take a look at the

Although natural join (natural join) is actually rarely used, it is actually very useful. If it can be used frequently, it is actually very convenient. A natural join is to search for fields with the same data type and column name in the two

Function open_cursor: open a dynamic cursor and return an integer; Procedure close_cursor (C in out integer); closes a dynamic cursor. The parameter is the cursor opened by open_cursor; Procedure parse (C in integer, statement in varchar2,

1. Hide query result F2 2. view object details F4 3. Clear screen F7 4. Call up the previously executed SQL command F8 5. Execute all SQL statements F9 6. directly execute the current SQL Ctrl + enter 7. Complete the table name or prompt to

ArticleDirectory . In the. NET program, you can use the ODP call feature to operate the Oracle database. Today, let's talk about the data batch insertion function. The technology used is not very high. I believe many of my friends have come

  Oracle is a large database that can be used to store massive data. There are also various ways to import data sources, some of which are constantly added as the business grows, and some are also imported in batch during business system

ArticleDirectory Oracle has many advantages, but if it is improperly used, it cannot take advantage of it. Here is my little experience in Oracle development, share with you. Oracle has many advantages, but if it is improperly used, it

1. View partition size Select segment_name, partition_name, Bytes/1024/1024 used_mbFrom dba_segmentsWhere segment_name in ('tableone ','Tabletwo ') 2. Compare the data differences between the two tables (Select * From Table1) Minus (Select

To obtain a data set from Oracle procedure, the ref cursor method is usually used. To obtain this cursor, there are several ways: 1. dynamic SQL return: In this case, procedure operations are usually relatively simple. For example, you can use a

Context: saasreportprocontext CTX = factory. saasreportprocontextfactory. getsaasreportprocontext (); There are three parameters: String reportname, string module, string type In LINQ to SQL VaR query = from o in CTX. reportorWhereO.