Josh Thompson, from somewhere in Colorado. Setting up Application Performance Monitoring in DataDog in your Rails App The type parameter must be of a valid MySQL data type. You can put a literal value or a column name as the argument for the expression parameter. How I take notes, AKA 'Add an Index to Your Notebook' The syntax for CAST() function is CAST( expression AS type ). How to take payments via Stripe on a Static SiteĪggregate and deduplicate your deprecation warnings in Rails Related postsĬultivate the Skill of Undivided Attention, or 'Deep Work' (Crosspost from ``) Here's a sample of a recent newsletter, about Robert Moses and NYC. If you don't see the subscribe form above, click here. It'll be about cities, parenthood, programming, climbing, urbanism, old scientific papers, books, power, and much more. I rushed through it to get to the more interesting portion of the book, which is Chapter 7: Thinking In Sets (AKA Joins tables!) Be entertained! Get novel OC via email. Chapter 6 was just about using WHERE and IS NULL and NOT LIKE clauses to filter down result sets. Now you can try the pipes operator, and decide if you want it to be permanent or not. To enable it in the current MySQL session, in the query interface just run DESCRIBE table will show the structure of the table. You can run MySQL in pipes_as_concat mode, according to StackOverflow. SELECT CAST(column1 AS CHAR(100)) adding CAST in the SELECT statement will not change the structure of TABLE, it will affect only that SELECT statement. I plan on just replacing any use of || in the book with the CONCAT function, unless someone suggests otherwise. SELECT EngagementNumber, EndDate, StartDate, CONCAT ( EndDate + 1 - StartDate, ' Day(s)' ) AS DaysToRun FROM engagements
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