Oracle

In an Oracle database, sequence is equivalent to a serial number, and the sequence is automatically incremented each time it is taken, and is typically used in places that need to be sorted by serial number.1. Create Sequence(Note: You need to have

In the Oracle database, all the data from the logical structure is stored in the table space, of course, the table space is also a section, area, block and other logical structure. From the physical structure is placed in the data file. A table

Remote machine:Installing Oracle's computer;Local machine:A computer that accesses an Oracle database on a remote machine.First, the problem descriptionInstall the Oracle database on the remote computer.On the local machine, after configuring

The structure of the data dictionary includes: – Basic table: Describes database information and can only be modified by the database server – User table: User-defined table Data dictionary Naming conventions

Summary record stored procedure syntax and how Java programs are invokedA stored procedureFirst, we build a simple table to test the stored procedureCreate TableXuesheng (IDinteger, xing_mingvarchar2( -), Yu_wen Number, Shu_xue Number);Insert

Get a list of dates:SELECT To_char (to_date (' 2014-10-01 ', ' yyyy-mm-dd ') + ROWNUM-1, ' yyyyMMdd ') as Daylist from dualconnect by ROWNUM Get the Month list:SELECT To_char (add_months (to_date (' 2014-10 ', ' yyyy-mm '), ROWNUM-1),

1. Common data types:--char (size): fixed-length character data type, length size specified; When using char, you can specify no maximum length, at which time the maximum length is 1.--nchar (size): fixed-length character value field for multibyte

Connecting to the Oracle database in C # has suffered a variety of pain.Using the VS Default way to connect to Oracle Discovery has version limitations, and you also need to install Oracle's clients, otherwise you won't be able to connect. The

---------------Export$exp ywpt/[email protected]File=d:\ywpt20140407.dmp log=d:\test.log owner= (YWPT);$exp yboltp/[email protected]_10.248.24.152 file=d:\ywpt20140407.dmp log=d:\test.log TABLES = '%bk_20140% ';---------------Import$imp ywgl/[email

Reference: http://blog.csdn.net/huzia/article/details/7616717Create environment variables, determine SID$ vim Rman. Env export Oracle_sid=rmanexport oracle_base=/opt/oracleexportoracle_home =/opt/oracle/11gLoad Environment variables$ source Rman.

The first time the bug is a lot of places, so pay attention to a lot, it took me three days to do all the bugs, I will pay attention to the points are listed, there may be a place to fall, but also please correct, mutual discussion.First on the

MySQL, Oracle stored procedure syntax differences1. Conditional statement: MySQL uses elseif keyword, Oracle is elsif keyword;OracleIf expression thenAn expression;elsifAn expression;endifMysql:If expression thenAn expression;ElseIfAn

CREATE OR REPLACE PROCEDURE proc_insert_bookkindlist (temtypename nvarchar2,temparent int) asncount number; Begin--select COUNT (*) into ncount from Bookkindlist fm1 where EXISTS (SELECT bookkindname from Bookkindlist fm2 where FM2.

Materialized views are a special physical table, and the materialized view is relative to the normal view. The normal view is a virtual table, the limitations of the application are large, any query on the view, Oracle is actually converted into a

#!/bin/bash#Purpose: Create and config Oracle install.#Usage: Log on as the superuser (' root ')#1. Create groups and users.Groupadd DBA-G 111Groupadd Oinstall-g 110Useradd oracle-u 110-g 110-g 111echo "Oracle" | passwd--stdin Oracleecho "Export tmp=

1,while CycleDeclareV_tnamevarchar2( -); cursorC_tname is SelectA.table_name fromUser_tables AwhereA.tablespace_name= 'Vtmdata';begin OpenC_tname; FetchC_tname intoV_tname; whileC_tname%found Loop dbms_output.put_line (v_tname); FetchC_tname

Oracle: Numeric random function is dbms_random.value (maximum, minimum) usage is select Dbms_random (3,0) from dual;Oracle: The function that gets the first 100 is RowNumber Oracle:cast ((NVL (sum (case B.HGXS when B.jcxs then 1 end), 0)/nvl (count (

Oracle single row Functions Single-row function syntax Function_name (column | expression, [arg1, arg2,...]) Parameter description: Function_name function name Column name Expression Arg1, arg2,... Parameters Single Row function category: Character

Oracle stored procedures and Java calls I found many bugs for the first time, so I paid a lot of attention. It took me three days to get rid of all the bugs. I will list all the points of attention, and there may be drops, please correct and discuss

Simple usage of the substr function in Oracle Substr (string, truncation start position, truncation length) // returns the truncated string (including the start position) Select substr ('helloworld',) value from dual; -- the returned result is