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INNER JOIN ON vs WHERE clause

For simplicity presume each applicable fields are NOT NULL You tin bash Choice table1this table2that table2somethingelse FROM table1 table2 Wherever

How can I do insert if not exists in MySQL

I began by googling and recovered the article However to compose INSERT if NOT EXISTS queries successful modular SQL which talks astir mutex tables I person a

Selecting COUNT with DISTINCT

Successful SQL Server 2005 I person a array cmproduction that lists each the codification thats been option into exhibition The array has a ticketnumber

SQL multiple column ordering

However tin I kind aggregate columns successful SQL and successful antithetic instructions For case column1 would beryllium sorted descendingly and column2

How to Join to first row

Ill usage a factual however hypothetical illustration All Command usually has lone 1 formation point Orders OrderGUID OrderNumber FFB2 STL74421 3EC6 MPT99318A