Oracle

In the development of SQL, filter date is often encountered in the situation, how to efficiently filter out the date period? This article is validated by experiments:Method One, compare dates into strings by To_charTo_char (cr.contractenddate, '

Original address: http://yanwushu.sinaapp.com/oracle_extract_year_month_day_valu/Previously, the To_char (Timefield, ' YYYY ') method was used to get the year field value in the date. The efficiency of this method is certainly not high, in order to

First select the procedures folder in the left folder and create a new stored procedure, as follows:Create or Replace procedure Uc_users_amount_pro (endDate in varchar2) is insmember number; Permember number; Insmembermon number; Permembermon

This afternoon encountered a very strange problem, under the Windows platform Sqlplus/as SYSDBA log in the database, prompting insufficient permissions,At that time, I was wondering, sys user Login database can also insufficient authority, the

1. Click "Run" on the Start menu and enter Sqlplus/nolog2. In the popup command line window login as SYSDBA, to enter: System username/Login Password @ DB instance name, such as sys/[email protected]3. Enter ALTER DATABASE backup Controlfile to

This document records how to create a table of Oracle structures in PowerDesigner. Before reading this article, you need to make DBMS modifications in PowerDesigner, database creation, user creation, and table space creation. 1. Create a table,

Many friends in the development project not everyone with a database, but a separate host as the development of the database server, so that our developers need to connect him. Although there are many online about the need to install the Oracle

--Create Tablecreate table Technologycompany (ID VARCHAR2 (+) default sys_guid () not NULL, Flowid VARCHAR2 ( (), Conpanyid number, iscommunication VARCHAR2 (Ten)) tablespace USERS pctfree Initrans 1 Maxtrans 255 Storag E (initial 64K minextents 1

NULL is a unique data type in the database description of NULL in Oracle NULLAbsence of a value in a column of a row. Nulls indicate missing, unknown, or inapplicable data. When a column of a record is NULL, it indicates that the value

First, using Dbms_sql to execute the queryUse Dbms_sql to execute SELECT statements in the order of open cursor-->parse-->define column-->execute-->fetch rows-->close cursor;1. Create a team table structure, as shown in:Proteamid: Primary Key ID,

--(' table ', ' line ', ' ods_xx ') all the tables and users in this case need to be capitalized.If the table name user name is not written, the error is reported: the object "EMP" is of type table, not found in the scheme "Scott"Pro-Test code:Set

C HR , ASCIIsyntax : CHR (string),ASCII (String)function: Returns a character that has an equivalent value in the database character set and X. CHR and ASCII are a pair of inverse functions. After the conversion of CHR character after the ASCII

1. View the current system version[Email protected] disk1]$ Sqlplus'/as sysdba'SQL*plus:release10.2.0.1.0-Production on Thu Jan the -: +: + -Copyright (c)1982,2005, Oracle. All rights reserved. Connected to:oracle Database 10g Enterprise Edition

Problem:Check out the employee's name, job, and salary, which are higher than the salary of all sales staff.Analysis:Any can represent arbitrary, but this problem requires a higher salary than all salespeople, then use a different keyword all.All is

Sql> Select substr (' Liuyuehui ', 3) as first_name from dual;First_Name--------------UyuehuiSql> Select substr (' Liuyuehui ', 1) as first_name from dual;First_Name------------------LiuyuehuiSql> Select substr (' Liuyuehui ', 0) as first_name from

 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. An Oracle database can have one or more table spaces, while one table

1. What is *.csv and how to get it?It contains a data sheet. Each row represents a row of a database table,In each row, the middle of each two data is separated by a comma ",".*.csv can be obtained by "save Excel file as *.csv".2. How do I import

Set up VNC Remote Desktop Connection in Linux to install Oracle11GPreface:在linux下面进行oracle安装，需要启动java的swing界面，所以需要x-window窗口，那么就需要直接去服务器机房去现场操作挺麻烦，远程xshell无法视窗，这种情况下可以采用vnc的模式远程连接linux系统的视窗来进行远程安装oracle。1. Check whether the VNC service has been

Oracle reported an error when importing imp data: ORA-12592: TNS: Package Error When using imp to import data, check that only more than 3 million data entries are actually imported into the more than 1 million data entries table and check the

Oracle object-oriented and set-oriented, oracle object-oriented This is a summary of my recent learning experience. 1. oracle object-oriented We all know that SQL is set-oriented, but it is undeniable that there are many places in oracle that