mssql modify column

Recently, I have always wanted to understand and understand MSSQL, but I have never thought about it and have no time to write it. At night I wrote an execution plan to explore MSSQL, this document describes the execution plan, but not limited to

Author: no_mIss QQ: 34813284 Time: 2006.11.07 23:30:00 Environment: win2003 + mssql2005   Recently, I have always wanted to understand and understand MSSQL, but I have never thought about it and have no time to write it. At night I wrote an

In project development, there are times when a column record is merged into a row, such as merging the names of people by region, or merging cities according to the initials, the following is an example of merging the names of people by region.First,

Mssql returns the table creation statement. mssql returns the creation statement. If OBJECT_ID ('SP _ create_table_ SQL ', 'P') is not nullddrop proc sp_create_table_sqlgocreate proc sp_create_table_ SQL (@ tablename varchar (255 )) as begin -- exec

Reading directory (content) 1 Concurrency control theory 1.1 Pessimistic concurrency control 1.2 Optimistic concurrency control 2 Isolation Level 2.1 Isolation Level Description 2.2 Read commmitted

If reproduced, please indicate the source of the blog: www.cnblogs.com/xinysu/, copyright belongs to the blog Garden su Home radish all. Hope you support! MySQL implements concurrency control through MVCC and locks, and in 4 isolation

These days, when a user asked me about the import of the ms SQL database, I found that the MSSQL database of Godaddy cannot be released through remote control or be directly restored by backing up the Bak, you must convert it to CSV to import the

At work we generally encounter the need to turn Heng lie into a vertical column, the following is a case of Heng lie:1. Build a tableCREATE TABLE [dbo].[Acrosschangeendlong]( [Id] [INT] IDENTITY(1,1) not NULL, [Name] [NVARCHAR]( -) not NULL,

Root Cause and solution of MSSQL deadlock, root cause of mssql deadlock 1. What is deadlock? A deadlock occurs when two or more processes compete for resources during execution. Without external force, they cannot be pushed forward. at this time, it

Row-to-column is a frequently encountered problem in SQL, and is divided into static and dynamic transformations, so-called static conversions are known or fixed in the number of rows converted; Dynamic conversions are not fixed for the number of