sql server update from select

CustomersSet cust_email = NULLwhere cust_id = 10005--81.2 update all rows in the table: Update all customer email addresses as ' [email protected] 'Update CustomersSet cust_email = ' [email protected] '--81.3 update multiple columns for customer 10005, email address and nameUpdate CustomersSet cust_email = ' [email pr

Today I want to talk about a particular problem that I will encounter every time I talk about lock and block (Locking Blocking) in SQL Server: Why do we need to update the lock in SQL Server? Before we explain the reasons for the specific needs, first I would like to introd

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Source: http://blog.csdn.net/dba_huangzj/article/details/37924127, Special catalogue: http://blog.csdn.net/dba_huangzj/article/ details/37906349 No person shall, without the consent of the author, be published in the form of "original" or used for commercial purposes, and I am not responsible for any legal liability. Objective: SQL Server is a Windows service that runs on a Windows operating system with a W

1 IntroductionThe previous article describes the basic use of DML in SQL Server, where the SELECT statement is the most commonly used statement, its powerful, complex structure, the following examples, the use of the method is described in detail.2 Select query statementThe SELECT