Technical Article

SQLServerCentral Webinar Series #10: SQL Server Backup and Restore for the Accidental DBA

Thursday, May 26, 2011 5:00 PM - 6:00 PM BST. Steve Jones will be your host to introduce Grant Fritchey, SQL Server MVP and Product Evangelist at Red Gate Software.
This webinar will take you through the best practices, standards and methods that you can employ to ensure that you have solid backup processes for the databases under your charge. You’ll also learn how to restore, because your backups are only good if you can restore them. Grant will show you how using Red Gate’s SQL Backup Pro and SQL Virtual Restore can make all this easier and more efficient.

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Question of the Day

Adding new column with DEFAULT II

Which number did the two COUNT(*) return:

DROP TABLE IF EXISTS #tmp
CREATE TABLE #tmp (id INT NOT NULL)

INSERT INTO #tmp (id) 
SELECT gs.value
  FROM GENERATE_SERIES(1, 5) AS gs

ALTER TABLE #tmp ADD my_value INT NOT NULL CONSTRAINT df_tmp_my_value DEFAULT 1

SELECT COUNT(*)  FROM #tmp AS t WHERE my_value = 1

ALTER TABLE #tmp DROP CONSTRAINT df_tmp_my_value

ALTER TABLE #tmp ADD CONSTRAINT df_tmp_my_value DEFAULT 2 FOR my_value

SELECT COUNT(*)  FROM #tmp AS t WHERE my_value = 1

See possible answers