DATETIME SELECT SELECT INTO DATE PAD STRING DYNAMIC SQL CURSOR MONEY FORMAT PERCENT STORED PROCEDURE SQL SERVER AGENT JOB OPTIMIZATION WHILE LOOP OVER PARTITION BY UPDATE
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How to perform an update in a different database?

You have to use 3-part addressing (naming) if the database is on the same server. This is an example:

USE Northwind;

UPDATE AdventureWorks.Person.StateProvince
SET IsOnlyStateProvinceFlag = 1
WHERE Name='Virgin Islands;

Related article:

Mastering the SQL UPDATE Syntax

 

Exam Prep 70-461
Exam 70-461
DATETIME SELECT SELECT INTO DATE PAD STRING DYNAMIC SQL CURSOR MONEY FORMAT PERCENT STORED PROCEDURE SQL SERVER AGENT JOB OPTIMIZATION WHILE LOOP OVER PARTITION BY UPDATE