sql select columns from table

CREATE TABLE as SELECT * FROM and insert to select from two table copy statement differences[SQL]View PlainCopy Create table targer_table as select * from source_table INSERT INTO target_table (column1,column2) select Column1,column2

The SQL SELECT into statement can be used to create a backup copy of the table.SELECT into statementThe SELECT INTO statement selects data from one table and then inserts the data into another table.The SELECT into statement is commonly used to

The syntax is as follows:1. Description: copy a table (only copy structure, source table name: a new table name: B) (access available)Method 1: Select * into B from a where 1 <> 1Method 2: Select top 0 * into B from 2. Description: copy a table

Http://www.cnblogs.com/gaizai/archive/2010/01/11/1644358.html   Before I start, I want to talk about several concepts. Overwrite Query] When an index contains all the columns referenced by a query, it is usually called "Overwrite query ". [Index

For example: We import a customer's information, we know that the customer's name is Zhangshan, we want to know, in our business database (Eg:northwind), which of the data tables which fields set the name value Zhangshan, through the following SQL,

18. Create and use a view tableView tableView table conceptsCreate a viewModify and delete a tableEnhanced viewing table functionality in SQL Server 2000SummaryIn Chapter 17th, we learned about indexes. indexes are a secondary database structure

Advanced Query Technology involves the link query technology of multiple tables, the subquery technology embedded in SELECT statements, and the joint technology that combines multiple queries. 1. The connection Query Needs to retrieve data from two

MS SQL Server Query optimization methodThere are many reasons for the slow speed of queries, which are common1, no indexes, or no indexes (this is the most common problem with query slowness, is the flaw in programming)2, I/o throughput is small,

Advanced Query Technology involves the link query technology of multiple tables, the subquery technology embedded in SELECT statements, and the joint technology that combines multiple queries. 1. Connection Query You need to retrieve data from two

The SQL scripts recommended in this article are all very practical. I learned how to study them together. The SQL scripts recommended in this article are all very practical. I learned how to study them together. Exchange of rows and columns The