create or replace view

Oracle's common performance monitoring SQL statementsFirst, query the history of sql:---The SQL statement being executed:Select A.username, A.sid,b.sql_text, B.sql_fulltextFrom V$session A, V$sqlarea b where a.sql_address = b.address;---Query the

Conn Scott/tiger;grant insert,update,delete on EMP to System;conn system/orcl1234;create or replace VIEW V_empas select em Pno,ename,job,hiredate,deptno from Scott.emp;IndexIn order to improve the speed of the query, when the user is not satisfied

Creation of the View:Create or Replace View as Select csib. * , Sib. Stock_io_,sib. Confirm_date_ from dm_mat_contract_stock_in_bill csibleftouter Joinon= sib. Bill_code_;Oracle cursors using: http://www.cnblogs.com/sc-xx/archive/2011/12/03/2275084

First, the ViewSyntax:CREATE VIEW name as subqueryExample: Create a view that contains all employee Information for the department ( employee number, name, job, date of employment )CREATE View EMP20 as select Empno,ename,job,hiredate from emp

Concept of view : Extracting logically related data collections from a tableView-related concepts :1. View is a continuation table2. Views are based on existing tables, and the tables on which the views are built are called base tables.3. The

Create a view named Employees_vu that is based on the employee number, employee name, and department number in the Employees table. Change the column header of the employee name to employee.CREATE VIEW Employees_vu as SELECT employee_id

Pen QuestionsWith the relationship emp (ENO,ENAME,SALARY,DNO) The meanings of each of these attributes are employee number, name, salary, department number, and Relationship dept (Dno,dname,manager) which are in order department number, department

Note: The MySQL database command is not case sensitive. But in the Mac terminal, if you want to use the tab auto-Complete command, then you have to use uppercase, so that the Mac terminal will help you complete the command, otherwise you press N

1. Concept of viewsA view in a database refers to a virtual table whose contents are defined by the query . Like a real table, a view is made up of rows and columns . The data source of the view is queried by the SQL statement and does not store the

View: A query statement that can correspond to one or more tables-- create a view without querying payroll Create or Replace View V_normal as Select e.empno,e.ename,e.job,e.mgr,e.hiredate from EMP E Order by E.hiredate--Query results as a table

Create a new Student information sheet (student) that requires:1. The fields are as follows: study number (SID), name, Gender (sex), age, address.2. Add a constraint for the field: The primary key, the name is non-empty, the gender is the check

applying SQL statements in functionsdef_get_cust_number (self,cr,uid,ids,field_name,args,context=None): Res={} forOrderinchSelf.browse (CR, UID, IDS, context=context): #获取单据信息AA=Order.originifAA: SQL = "Select T1.cust_numr_no from Stock_fah t0

1. Problem: PL/SQL beautification cannot parse textThe original SQL statements are as follows:CREATE OR REPLACE VIEW V_GGXZBM asSELECT Xzbm,xzmc,case when PARENTXZBM was NULL then ' 320000 ' ELSE parentxzbm END parentxzbm,pxxh from SYS_XZBMB WHERE

Concept:View: The so-called view is to extract one or more tables of data to generate a map, management view can also achieve the effect of the original table, convenient data management and security operations.A view is actually a query SQL

0. User management:1. New User:>create USER name identified by ' Ssapdrow ';2. Change Password:>set PASSWORD for Name=password (' FDDDFD ');3. Rights Management>show GRANTS for name; View name User Rights>grant SELECT on db_name.* to name; All

View, which combines some data from a base table into a form of a virtual table, is called virtual because it exists only when the view is used in a single statement. At the same time, if the data in the view is modified, the data in the base table

Original address: http://www.cnblogs.com/BetterWF/archive/2012/06/12/2545829.htmlReproduced in reserveCompare size function Signfunction Syntax:Sign (n)Function Description:Take the sign of the number n, greater than 0 returns 1, less than 0 returns-

Some examples in this article are the assumption that the DB is the test table named user.1. Grammar(1) Select Column name from table name [query condition]: column names can contain multiple, separated by commas, you can use wildcards, such as * to

1. FunctionsA function can pass a parameter, or it can have a return value. But a function can have only one return valueFunction can contain 0-multiple parametersDeclare functions with no parameters (the following are examples of MySQL

View definition:-- view is a virtual table. -- The view is based on existing tables, and the tables on which the views are built are called base tables.-- The statement that provides the data content to the view is a SELECT statement that can be