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1 cze 2021 · To get all events for next three months from today: SELECT. event_date, event_name ROM c alend r WH ERev n t _da B T NCU DA CU RE NT_D A+ I V L '3 MO H; To get part of the date: SELECT EXTRACT(YEAR FROM birthday) FROM artists;,.
1 cze 2021 · Standard SQL Functions Cheat Sheet. TEXT FUNCTIONS. CONCATENATION. Use the || operator to concatenate two strings: SELECT 'Hi ' || 'there!'; -- result: Hi there! Remember that you can concatenate only character strings using ||. Use this trick for numbers: SELECT '' || 4 || 2; -- result: 42.
SQL Cheat Sheet. The SQL cheat sheet provides you with the most commonly used SQL statements for your reference. You can download the SQL cheat sheet as follows: Download 3-page SQL cheat sheet in PDF format. Querying data from a table. Query data in columns c1, c2 from a table. SELECT c1, c2 FROM t;
Whether you need a quick reference for major SQL concepts before an interview, or you want to level-up your existing SQL skills, our SQL cheat sheet is the ideal starting point. Plus, we’ve broken it down into 11 essential SQL topics to help you get the most from this SQL query cheat sheet.
25 sie 2021 · This comprehensive cheat sheet is packed with syntax for different text and numeric functions, CASE WHEN statements, handling NULL, date and time types, INTERVALs, and aggregate functions. It also features a troubleshooting section to help you navigate through common issues seamlessly.
The GROUP BY clause is usually used with an aggregate function (COUNT, SUM, AVG, MIN, MAX). It groups the rows by a given column value (specified after GROUP BY) then calculates the aggregate for each group and returns that to the screen.
ELSE [value_3] END AS [new_column_name] Using if/then logic in SQL with CASE: WITH track_info AS (SELECT t.name, ar.name artist, al.title album_name, FROM track t INNER JOIN album al ON al.album_id = t.album_id INNER JOIN artist ar ON ar.artist_id = al.artist_id) SELECT * FROM track_info WHERE album_name = "Jagged Little Pill"; Using the WITH ...
