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How does SQL Server modify the auto-increment column value and corresponding solutions?
A special task encountered in today's work is to change the values of the two auto-incrementing columns.Since the SQL Server platform has previously migrated the
The purpose of writing this essay is to clarify some of the facts and opinions in my previous article "abandon the auto-increment ID of the database and expose the solution I used". At the same time, I will continue to answer the concurrent
SQL Server 2008 database primary key auto-increment insert display value
When you delete the table data in the database a few days ago at work, after the deletion, the newly added data does not get the id value of the original data (the table id is
After I published the article "Performance Comparison of Self-increment fields and guid field primary keys used in the Database", I got a lot of comments from my friends in the blog Park, we have also proposed some improvement methods for my testing
1.1.1 Summary
During the development process, we may encounter system performance bottlenecks from time to time, which may be caused by insufficient code efficiency or hardware or network problems, it may also be a problem with database design.
This
SQL Server database primary key self-increment insert display valueA few days ago at work encountered in the deletion of the database table data, when deleted, the re-added data did not get the original data ID value (the table ID is the primary key,
Sequence CreationCreate sequence name (for example, "urlimage_seq") minvalue 1 maxvalue 999999999999999999999999999 increment by 1 start with 101 Cache 10 noorder nocycle;
Trigger triggerCreate or replace trigger name (for example,
Databasedefinition : Some data files stored on the hard diskMemory:Some data that the computer temporarily stores. Net-sql ServerPhp-mysqlJava-oreaclData types in the database:int decimal (length, number of decimal digits)Bit-Boolean type 1-true
Several solutions have been used for database paging over the years, which are summarized as follows:
1. Use the row_number function and temporary table paging. SQL 2005/2008 is applicable.
The general idea is as follows:
Select *, row_number (
This note sorts out the video lecture "SQL from getting started to improving" trained by Yang zhongke in Chuanzhi podcast. net. Video related links: http://www.rupeng.com/forum/tj-16325-2477.html
Database concepts
1. What is an index? What are the
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