how to compare two table data in sql server

special order. There are no link tables between data pages.1.3 Nonclustered indexesNonclustered indexes have a similar B-tree index structure to the clustered index. The difference is that nonclustered indexes do not affect the order of data rows. The leaf level contains only index rows and no complete data. Each index row contains nonclustered index key values

based on specific queries, and of course you can create statistics manually.First, to intuitively understand what the statistics look like, reference, that is,_wa_sys_**** begins with the statistics that the system creates as needed,The same name as the index is the statistics created on the index,Manually creating statistics can also be self-named in cases where SQL Server naming requirements are met.　　Th

Common Data Types in SQL Server: SQL Server Data Types To http://www.cnblogs.com/andy_tigger/archive/2011/08/21/2147745.html Bit integerThe bit data type is an integer, and its value ca

name = 'object name' SELECT * FROM sys. sysobjects WHERE name = 'object name' How can I view fields in the view in the SQL Server2005 database? 1. In SQLSERVER manager, right-click the View Graph and choose design. On the design screen, you can see the column, source table, and logic.2. Select SQLSERVER manager and click the plus sign (+) to expand the chart.3. Use the

SQL Server temporary table and cursor usage summary, SQL Server 1. Temporary table Temporary tables are similar to permanent tables, but temporary tables are stored in tempdb. They are automatically deleted when they are no longer

primary key in the table and the data is ordered, so the query optimizer of the database automatically chooses the merge connection. The merge connection works as shown in the following:Figure 2 How the merge connection worksAfter deciding to use a merge connection, the database optimizer matches the first row of data in two tables (the term called the input col

SQL Server Enterprise Platform Management Practice reading notes--sql data file space usage and management in server1. Table and index storage structureBefore SQL Server2005, a table wa

, which is generally used to guide some data CREATE TABLE student_table ( stuid varchar, CourseID varchar, grade int ) CREATE TABLE Student ( stuid varchar, CourseID varchar, grade int ) INSERT into student_table values (' 10001 ', ' 001 ', ' I ') INSERT into student_table values (' 10002 ', ' 001 ', ' 95 ')INSERT INTO studentSELE

structure and data to a new table SELECT * into from Original table name We copy the structure and data of the table test to the new table test1: SELECT * into from Test The results are as follows: 2. Back up part of the