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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;
CASE WHEN SELECT[comparison_1] THEN [value_1] WHEN [comparison_2] THEN [value_2] 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)
CASE. WHEN and SUM(): SELECT customer_id, SUM(CASE WHEN quantity > 10 THEN 1 ELSE 0 END) AS large_orders FROM sales GROUP BY customer_id;... or using CASE WHEN. and . COUNT(): SELECT customer_id, COUNT(CASE WHEN quantity > 10 PTHEN order_id END) AS large_orders FROM sales GROUP BY customer_id; GROUP BY EXTENSIONS. GROUPING SETS. GROUPING SETS
1 cze 2021 · ELSE 'not available' END AS tariff FROM ticket_types; The most popular type is the searched CASE WHEN – it lets. you pass conditions (as you'd write them in the WHERE clause), evaluates them in order, then returns the value for the first condition met. SELECT CASE WHEN score >= 90 THEN 'A' WHEN score > 60 THEN 'B' ELSE 'F' END AS g ade FROM ...
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;
The SQL CASE Expression. The CASE expression goes through conditions and returns a value when the first condition is met (like an if-then-else statement). So, once a condition is true, it will stop reading and return the result. If no conditions are true, it returns the value in the ELSE clause.
14 kwi 2024 · The SQL CASE statement provides a way to perform conditional logic within SQL queries. It evaluates a set of conditions and returns a result based on the first condition that evaluates to...
