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How to add column if not exists on PostgreSQL?

...s, _col text, _type regtype) RETURNS bool AS $func$ BEGIN IF EXISTS (SELECT 1 FROM pg_attribute WHERE attrelid = _tbl AND attname = _col AND NOT attisdropped) THEN RETURN FALSE; ELSE EXECUTE format('ALTER TABLE %s ADD COLUMN %I %s...
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Sorting dropdown alphabetically in AngularJS

... Angular has an orderBy filter that can be used like this: <select ng-model="selected" ng-options="f.name for f in friends | orderBy:'name'"></select> See this fiddle for an example. It's worth noting that if track by is being used it needs to appear after the orderBy filt...
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Git in Visual Studio - add existing project?

... Just right click on your solution and select Add to source control. Then select Git. Now your projects has been added to a local source control. Right click on one of your files and select Commit. Then enter a commit message and select Commit. Then select Sync ...
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Dynamic Sorting within SQL Stored Procedures

...eing duplicated twice in the order by, and is a little more readable IMO: SELECT s.* FROM (SELECT CASE @SortCol1 WHEN 'Foo' THEN t.Foo WHEN 'Bar' THEN t.Bar ELSE null END as SortCol1, CASE @SortCol2 WHEN 'Foo' THEN t.Foo WHEN 'Bar' THEN t.Bar ELSE...
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How do I select a random value from an enumeration?

Given an arbitrary enumeration in C#, how do I select a random value? 9 Answers 9 ...
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How do you kill all current connections to a SQL Server 2005 database?

...problems ALTER DATABASE aspnetdb SET SINGLE_USER WITH ROLLBACK IMMEDIATE select GETDATE() ALTER DATABASE aspnetdb SET MULTI_USER what do you have instead of the commented out code? – SQLMenace Aug 17 '10 at 18:33 ...
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How to execute a bash command stored as a string with quotes and asterisk [duplicate]

...quotes. MYSQL='mysql AMORE -u username -ppassword -h localhost -e' QUERY="SELECT "'*'" FROM amoreconfig" ;# <-- "double"'single'"double" eval $MYSQL "'$QUERY'" Bonus: It also reads nice: eval mysql query ;-) share ...
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How do you list the primary key of a SQL Server table?

... SELECT Col.Column_Name from INFORMATION_SCHEMA.TABLE_CONSTRAINTS Tab, INFORMATION_SCHEMA.CONSTRAINT_COLUMN_USAGE Col WHERE Col.Constraint_Name = Tab.Constraint_Name AND Col.Table_Name = Tab.Table_Name ...
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Eclipse git checkout (aka, revert)

...ing" view, right click the deleted file in the "Unstaged Changes" list and select "Replace with HEAD Revision" – Vlasta Dolejs Sep 5 '17 at 8:03 add a comment ...
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Debugging App When Launched by Push Notification

...opdown. (⌘+<) Than choose your product - 'Run MyApp.app' on the left. Select 'Info' tab on the right. And finally choose "Wait for MyApp.app to launch" option. More here in "Customize Executables in the Scheme Editor" section. EDIT: In case you miss logs in GDB, see Louis Gerbarg's comment t...