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publishing side with the verification subscription function at the publisherMethod Seven: Compare the checksum values of the contents of two tables with checksum checkBut this approach is only confined to the two-table structure.I copy the data from the [t1_new] table to a new table for comparisonSELECT * from [dbo].[t1_new]SELECT * from [dbo].[T1_newreplica]SELECT SUM(CHECKSUM (*)) asChecksumvalue from
function at the publisherMethod Seven: Compare the checksum values of the contents of two tables with checksum checkBut this approach is only confined to the two-table structure.I copy the data from the [t1_new] table to a new table for comparisonSELECT * from [dbo].[t1_new]SELECT * from [dbo].[T1_newreplica]SELECT SUM(CHECKSUM (*)) asChecksumvalue from [dbo].[T1_old]SELECT SUM(CHECKSUM (*)) asChecksumva
Differences between temporary tables in Oracle and temporary tables in SQL Server compared with the process of creating temporary tables in Oracle databases and the differences between
class CHAR ())
5 on COMMIT PRESERVE ROWS;
sql> INSERT INTO permernate values (2);
sql> INSERT into the Admin_work_area values (Sysdate,sysdate, ' session temperary ');
Sql> commit;
Sql> select * from Permernate;
A
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1
Differences between Oracle temporary tables and SQL Server temporary tables:
The process of creating a temporary table in the Oracle database and the difference between the temporary table and the SQL
Start
A while ago, a project encountered such an SQL query requirement. There were two tables with the same structure (table_left table_right), as shown below:
Figure 1.
Check whether there is a group of (groupId) data in table table_right that is exactly the same as its data.
1. We can see that the table_left and table_right tables have two groups of data that
Begin
A while ago, there was an SQL query requirement in the project, with two tables of the same structure (Table_left Table_right), as follows:
Figure 1.
Examine the groups (GROUPID) of the table table_left, and whether there is a set of (GROUPID) data in the table table_right that is exactly the same as its data.
As shown in Figure 1. You can see that there are two sets of data complete equality f
Start
A while ago, a project encountered such an SQL query requirement. There were two tables with the same structure (table_left table_right), as shown below:
Figure 1.
Check whether there is a group of (groupId) data in table table_right that is exactly the same as its data.
1. We can see that the table_left and table_right tables have two groups of data that
The syntax of the create statement is the same, and the data types are different.
However, the syntax for creating a table using subqueries is different.
SQL Server statements created using subqueries:Select empno, ename, Sal * 12 annsal, hiredate into dept30 from EMP where deptno = 30;
Oracle uses query to create a table:Create Table dept30
Select empno, ename, Sal * 12 annsal, hiredate
From EMP
Where de
data tables-----3. How to insert data------1) Insert the data into the temporary table---Insert into#Temp_Student (Age,name)Values( +,'Zhang San'),( A,'John Doe') --2) Insert the data into the data table---Insert intoData_student (Age,name)Values( at,'Harry'),( -,'Zhao Liu')4. How to query temporary tables and data table data-- ---4, how to query the data--
@t1_newcount=COUNT (*)FromT1_new;SELECT@count=COUNT (*)From[T1_old]AsAINNERJOIN[T1_new]As BOn[B].[Id]=[A].[Id]and[B].[Log_time]=[A].[Log_time]-- If there are other fields in the table that you add yourself print print @t1_newcount if ( @count = @t1_newcount ) begin ' equal "end else begin select Span style= "color: #ff0000;" > ' Method five: With SQL Server's own Tablediff tool, Microsoft made this tool to comp
. If you create a global temporary table named # employeesAny user in the data table can perform operations on the table. If the table is not used by other users after you create it, delete it when you disconnect it. If the table is createdOtherwise, SQL Server deletes the table after all users are disconnected.Different:1. the SQL
prefixed, only the local user connection can be accessed. The names of global table variables are prefixed with "@". Generally, they are system global variables. For example, @ error indicates the error number, @ rowcount indicates the number of affected rows.
For example, let's look at the statement for creating table variables:
Declare @ news table (news_id int not null,
Newstitle varchar (100), newscontent varchar (2000), newsdatetime)
You can select, insert, update, and delete
one type of variables. Table variables are also divided into local and global variables. The names of local table variables are prefixed, only the local user connection can be accessed. The names of global table variables are prefixed with "@". Generally, they are system global variables. For example, @ error indicates the error number, @ rowcount indicates the number of affected rows.
For example, let's look at the statement for creating table variables:SQL code
Declare @ news table
(
News
indicates the error number, @ rowcount indicates the number of affected rows.
For example, let's look at the statement for creating table variables:
DECLARE @ News Table(News_id int not null,NewsTitle varchar (100 ),NewsContent varchar (2000 ),NewsDateTime datetime)
You can select, insert, update, and delete SQL statements to compare temporary tables
= ' U ' ORDER by 1, 2--compare differences for each table field in two databases select Table name a = case when ISNULL (A.tablename, ') 在开发过程中线上的数据库表字段和本地数据库表字段是存在的,也许我们在本地数据库中所增加的表字段都会有记录到SQL文件中,但当增加的表及字段名称较多时总会出现漏网之鱼,发布真是版本的时候回出现很多很多的问题,那么如何在发布新的版本时保证线上数据库与本地数据库中的表字段都是统一的了,下面我说一个比较笨的方法去保证两个数据库无差异。 1、将线上的数据库架构生
exists, or if it already exists, you will get an error creating the object repeatedly. A, the global temporary table will be drop,drop after the session at which it was created, and other sessions will not be able to reference the global staging table. b, the reference is at the statement level, such as: 1. Create a new query window and run the statement:TABLE # #int) into # #VALUES (3) 2. Create a new query window again, referencing the globa
1,
Reprinted: http://database.ctocio.com.cn/tips/442/8206442.shtml
In SQL Server performance tuning, there is an incomparable problem: that is, how to process temporary datasets in a code that requires a long time or frequently called code? Table variables and temporary tables are two options. I remember seeing a large number of temporary data set processing requ
user account (or the corresponding ID of the account ). When other users log on to the system, the system first queries from this temporary table to check whether the same user records exist. If yes, the user will be rejected and the user will be warned that the same user has logged on. When the user exits the system normally or ends the current session due to other reasons, the database system will clear the contents of this table. In this way, you can log on to the system even if you log on t
One, table variables
Table variables were introduced for the first time in SQL Server 2000. The specific definition of a table variable includes a column definition, a column name, a data type, and a constraint. Constraints that can be used in table variables include primary KEY constraints, UNIQUE constraints, NULL constraints, and CHECK constraints (foreign KEY constraints cannot be used in table variabl
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