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How do you find the disk size of a Postgres / PostgreSQL table and its indexes

...ema || '"."' || table_name || '"')) AS size FROM information_schema.tables ORDER BY pg_total_relation_size('"' || table_schema || '"."' || table_name || '"') DESC; Edit: Here's the query submitted by @phord, for convenience: SELECT table_name, pg_size_pretty(table_size) AS table_size,...
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How to check date of last change in stored procedure or function in SQL server

... SELECT name, create_date, modify_date FROM sys.objects WHERE type = 'P' ORDER BY modify_date DESC The type for a function is FN rather than P for procedure. Or you can filter on the name column. share | ...
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Getting the first index of an object

... If the order of the objects is significant, you should revise your JSON schema to store the objects in an array: [ {"name":"foo", ...}, {"name":"bar", ...}, {"name":"baz", ...} ] or maybe: [ ["foo", {}], ["ba...
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RSpec: describe, context, feature, scenario?

...ike this: # # The feature/behaviour I'm currently testing # describe "item ordering" do # 1st state of the feature/behaviour I'm testing context "without a order param" do ... end # 2nd state of the feature/behaviour I'm testing context "with a given order column" do .. end ...
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Access an arbitrary element in a dictionary in Python

...te that "first" may not be an appropriate term here because dict is not an ordered type in Python < 3.6. Python 3.6+ dicts are ordered. share | improve this answer | follo...
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When should I use Lazy?

...ou have an entity Customer which has properties for Name, PhoneNumber, and Orders. Name and PhoneNumber are regular strings but Orders is a navigation property that returns a list of every order the customer ever made. You often might want to go through all your customer's and get their name and ph...
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How to flatten tree via LINQ?

...Flatten(node => node.Elements); If you would prefer flattening in pre-order rather than in post-order, switch around the sides of the Concat(...). share | improve this answer | ...
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SQL JOIN - WHERE clause vs. ON clause

... They are not the same thing. Consider these queries: SELECT * FROM Orders LEFT JOIN OrderLines ON OrderLines.OrderID=Orders.ID WHERE Orders.ID = 12345 and SELECT * FROM Orders LEFT JOIN OrderLines ON OrderLines.OrderID=Orders.ID AND Orders.ID = 12345 The first will return an order ...
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What are the differences between a clustered and a non-clustered index?

...le Faster to read than non clustered as data is physically stored in index order Non Clustered Index Can be used many times per table Quicker for insert and update operations than a clustered index Both types of index will improve performance when select data with fields that use the index but...
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Random row from Linq to Sql

...de... throw new NotImplementedException(); } } Then just order by ctx.Random(); this will do a random ordering at the SQL-Server courtesy of NEWID(). i.e. var cust = (from row in ctx.Customers where row.IsActive // your filter orderby ctx.Random() ...