data type change in sql server 2008

When you create a table, you must assign a data type to each column in the table. This section describes some of the most common data types in SQL Server. Even if you create a custom data type, it must be based on a standard SQL Server data type.

This article discusses how to reduce the database from SQL Server 2008 to 2005, because local development is done in the SQL Server Express Edition version, and the host provider now provides the MSSQL only to 2005, So we need to get the database

In SQL Server queries, inadvertently hidden data type conversions can cause significant query performance problems. For example, there is a simple condition that does not seem to matter: where C = N ' x '. Suppose that the data type of c is varchar.

In SQL Server queries, inadvertently hidden data type conversions can cause great query performance problems, such as a simple condition that looks like there is no problem: WHERE c = N ' x ', if the data type of c is varchar, and the table contains

First, Summary:This article mainly describes how to install the cluster configuration for SQL Server 2008 on a Windows Server R2 system.Second, prepare:At least three servers need to be prepared in advance (the reason to see here

Cdc:change Data Capture Copy Code code as follows: --Step: Take Gposdb as an example in this paper --first step, explicitly enable CDC on target library:--use sys.sp_cdc_enable_db in the current library. Returns 0 (Success) or 1

In large database applications, it is common to encounter partial data offline and multiple database consolidation issues. For example, there is now a province-wide application, each city has deployed a separate application server and database

Why SQL Server has three backup methods for full, differential, and transaction log backups, and why the database has three recovery modes, simple mode, full mode, and bulk-logged mode. This article applies to all versions of SQL Server databases

In SQL Server 2008, the relational database engine is relatively new, and this article will focus on the new features that application developers and database administrators are more concerned about. New features related to developers: Change Data

There is often a need to record data changes caused by DML operations (Insert/updae/delete) in the user table, and in previous versions of SQL Server 2008, such functionality could only be achieved through trigger or data alignment (for example, SCD