Category Archives: SQL

SQL Snapshot Notes

Sometimes when testing you need to repetitively restore a database back to a certain point in time. For very large databases the regular SQL restore can take quite a while. It seemed to me that using snapshots instead of regular … Continue reading

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Force a SQL Restore

Really tired of having to google this and piece it together every time I want it, so I’m posting it here. alter database DbName set single_user with rollback immediate go restore database DbName from disk = ‘path/to/backup.bak’ with file = … Continue reading

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Update a SQL table’s XML value to insert a node

Sometimes a snippet of example code is all that’s needed: update MyTable set XmlColumn.modify(‘ insert <Description>This is a description</Description> as last into (/xpath/to/parent)[1] ‘) where SomeValue = ‘whatever’

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SQL Injection Joke (with a lesson)

At a recent team stand up meeting I passed along a joke I caught on twitter:   A SQL Injection walks into a bar, starts to quote something but stops, drops a table, then dashes out. The joke is a … Continue reading

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Drop a SQL column default constraint that has been implicitly named

CodeMinder: to remind myself of stuff that I usually have to look up each time I do it. Notice the unnamed default in the following line: alter table test add col1 int not null default 1 This creates a default … Continue reading

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Update a SQL table’s XML value to remove nodes

CodeMinder: to remind myself of stuff that I usually have to look up each time I do it. To delete all PersonAlternativeName nodes from XmlColumn of the People table: with xmlnamespaces( ‘http://mydomain.com/person/extension/0.1’ as px) update People set XmlColumn.modify(‘delete //px:PersonAlternateName’)

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Select multiple XML nodes out of each row in a SQL table

CodeMinder: to remind myself of stuff that I usually have to look up each time I do it. If a People table has a column named XML, and the XML column may specify multiple PersonAlternativeName entities, then to get all … Continue reading

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