sql create temp table from query

Turn from: http://tong7858-126-com.iteye.com/blog/829323 1. In versions above Oracle8, you can use the following statements to index names and queries that create INDEX statements.SELECT index_name,dbms_metadata.get_ddl (' INDEX ', Index_name,table_owner) index_ddlFrom User_indexesWHERE table_name like ' kj_% '; --' kj_% ' represents a set of tables that begin with KJ and can be based on--Change to the appropriate

Create two-table join query views in Oracle In project development, multi-table queries are sometimes used, and there are many methods, such as association, such as views. However, View queries are the fastest for queries, if your database has a lot of field information, you need to

=n ' Ms_description ', @value =n ' table notes ', @level0typE=n ' SCHEMA ', @level0name =n ' dbo ', @level1type =n ' table ', @level1name =n ' name ' EXEC sp_updateextendedproperty @name =n ' Ms_ Description ', @value =n ' table Notes ', @level0type =n ' SCHEMA ', @level0name =n ' dbo ', @level1type =n ' table ', @lev

This tutorial introduces the multi-Table query in SQL. Let's take a look at the specific instance. Create two tables: Table 1: student: Table 2: course: (in this case, the table is crea

Tags: style color os using AR strong data SP problemUse ContentProvider to inquire, sometimes not very spirit. Like the following code, the data exists in the database, but it can't be found. The reason may be that the field does not have a claim type:As follows:Private final static String sql_create_table_installed ="CREATE TABLE if not exists" + table_installed + "("+ "id not null,"+ "Name text NOT NULL,"

nested queriesShow the city's non-Shanghai staff information:SELECT * from staff where warehouse number in (select warehouse number from warehouse where city! = ' Shanghai ')Displays the average sales amount and warehouse number information for employees in different warehouses, provided that the average sales amount is greater than 15000 or the maximum sales amount is less than 18000 and the average wage of all employees is greater than 800 of the warehouse area:Select warehouse Number, AVG (a

This tutorial for you to introduce the SQL of the multiple table query, let's look at the specific examples. Create a new two sheet: Table 1:student screenshot as follows: Table 2:course screenshot as follows: (This is jus

First SQL statementSelect CompanyName GSMC,ZB Zhibiao from Left Join T_companycode on T_GSNDZB.GSBH=T_companycode.companyidQuery Result:A second SQL statementSELECT min(CompanyName) GSMC,cast(round(sum(T_xstj.hsje)/10000,2) asNumeric -,2)) Ndje fromT_xstj Left JoinT_companycode onT_companycode.companyid=T_XSTJ.GSBHwhere DateDiff( YearSjgetdate())=0 Group byGsbhQuery Result:Statements that are merged int

the average price of business books is empty, but that such books do not meet the statistical conditions.Matters to be noted with the GROUP BY clause:(1) You cannot use aggregate functions in the GROUP BY clause.(2) All the nonclustered items in the Select select list must be listed in the GROUP BY clause.Example: The type,pub_id column must be listed in the GROUP BY clause of the following statement, integral 4.COMPUTE clauseNot only does it display statistical results, but it also displays

Create a keyboard shortcut quick query table. Most developers do not understand this, but Visual Studio provides over 450 keyboard shortcuts by default. However, there is no easy way to find all keyboard shortcuts in Visual Studio. You can write a simple macro to traverse all the default keyboard shortcuts and find their corresponding operations. The code for thi

To determine if a table does not exist, create a table:if exists (SELECT * from dbo.sysobjects WHERE id = object_id (N ' [dbo].[ TableName] ') and OBJECTPROPERTY (ID, N ' isusertable ') = 1)BeginCREATE TABLE [dbo]. [TableName] ([FID] [INT] Not NULL,[FCode] [varchar] (255) COLLATE chinese_prc_ci_as NULL,[FName] [varchar] (255) COLLATE chinese_prc_ci_as NULL,[Fpare

to be linked. ON: Specifies the fields shared by these tables. Specify the connection conditions based on the primary key and external key of the table. The ANSI link syntax is as follows: SELECT table_name.column_name, table_name.column_name ,...... FROM {table_name [join_type] JOIN table_name ON search_conditions} WHERE [search_conditions] [Join_type] can be in the following three keywords: INNER (inner join): the link

Create a new two sheet: Table 1:student screenshot as follows: Table 2:course screenshot as follows: (This is just a table to demonstrate the connection of SQL statements, of course, in the actual development we do not build tables, the actual development of the two

Usage scenarios:For example, you need to query all student numbers with scores greater than 95, separated by commas into a string, from the Student score table.To prepare the test data:CREATE TABLE score (ID int,score int)INSERT into score values (1,90)INSERT into score values (2,96)INSERT into score values (3,99)It is now necessary to query the result string "2,

Label:You can implement multiple table queries by using the Join operator. Connection is the main feature of relational database model, and it is also a sign that distinguishes it from other types of database management system.In the relational database management system, the relationship between the data is not determined, and all the information of an entity is often stored in a single table. When retriev

Label:Constraints fall into the following categories: 1) non-null constraints, using the not nulls keyword; 2) Default value constraints, using default keyword; 3) Check the constraints, use the CHECK keyword; 4) Unique constraints, using the unique keyword; 5) Primary KEY constraint, using primary key keyword; 6) FOREIGN KEY constraint, use foreign key keyword. The constraint is to ensure the integrity of the data, which prevents data that you do not want to insert into the input. The followin

--Get Stored Procedure creation statement Select O.xtype,o.name,cm.text from syscomments cm inner join sysobjects o on o.id=cm.id where xtype = ' P ' order By o.xtype,o.name,cm.text--get view path creation statement Select O.xtype,o.name,cm.text from syscomments cm inner join sysobjects o on o.id=cm . ID where xtype = ' V ' ORDER by o.xtype,o.name,cm.text--queries all table names, field names, types, lengths select O.name, c.name,t.name,c.length from

Http://www.dedecms.com/knowledge/data-base/sql-server/2012/0709/2872.html This article lists two or three tables for multi-table join queries.Create two tables:Table 1: Student:Table 2: course:(In this case, the table is created to demonstrate the connection to the SQL statement. Of course, we will not

Create two tables:Table 1: student:Table 2: course:(In this case, the table is created to demonstrate the connection to the SQL statement. Of course, we will not create the table in actual development. In actual development, the two tables will have their own primary keys .)

SALESMAN30 sales CHICAGO 7499 ALLEN SALESMAN30 sales CHICAGO 7900 JAMES CLERK30 SALES CHICAGO 7698 BLAKE MANAGER30 sales CHICAGO 7654 MARTIN SALESMAN30 sales CHICAGO14 Rows selected.--Using a using clause to create a connectionSelect E.empno,e.ename,d.dname,d.locFrom EMP EJoin Dept Dusing (DEPTNO)where Deptno in (20,40);idle> Select e.empno,e.ename,d.dname,d.locfrom emp ejoin Dept dusing (DEPTNO) where