180 lines
8.8 KiB
MySQL
180 lines
8.8 KiB
MySQL
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-- https://dev.mysql.com/doc/refman/8.0/en/with.html#common-table-expressions-similar-constructs
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WITH cte1 AS (SELECT a, b FROM table1), cte2 AS (SELECT c, d FROM table2) SELECT b, d FROM cte1 JOIN cte2 WHERE cte1.a = cte2.c;
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WITH cte (col1, col2) AS (SELECT 1, 2 UNION ALL SELECT 3, 4) SELECT col1, col2 FROM cte;
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WITH cte AS (SELECT 1 AS col1, 2 AS col2 UNION ALL SELECT 3, 4) SELECT col1, col2 FROM cte;
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WITH RECURSIVE cte (n) AS (SELECT 1 UNION ALL SELECT n + 1 FROM cte WHERE n < 5) SELECT * FROM cte;
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WITH RECURSIVE cte AS (SELECT 1 AS n, 'abc' AS str UNION ALL SELECT n + 1, CONCAT(str, str) FROM cte WHERE n < 3) SELECT * FROM cte;
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WITH RECURSIVE cte AS (SELECT 1 AS n, CAST('abc' AS CHAR(20)) AS str UNION ALL SELECT n + 1, CONCAT(str, str) FROM cte WHERE n < 3) SELECT * FROM cte;
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WITH cte1 AS (SELECT 1) SELECT * FROM (SELECT * FROM cte2 JOIN cte1) AS dt;
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WITH RECURSIVE cte AS (SELECT 1 AS n, 1 AS p, -1 AS q UNION ALL SELECT n + 1, q * 2, p * 2 FROM cte WHERE n < 5) SELECT * FROM cte;
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WITH RECURSIVE cte (n) AS (SELECT 1 UNION ALL SELECT n + 1 FROM cte) SELECT * FROM cte;
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WITH RECURSIVE cte (n) AS(SELECT 1 UNION ALL SELECT n + 1 FROM cte) SELECT /*+ SET_VAR(cte_max_recursion_depth = 1M) */ * FROM cte;
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WITH RECURSIVE cte (n) AS (SELECT 1 UNION ALL SELECT n + 1 FROM cte) SELECT /*+ MAX_EXECUTION_TIME(1000) */ * FROM cte;
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WITH RECURSIVE cte (n) AS (SELECT 1 UNION ALL SELECT n + 1 FROM cte LIMIT 10000) SELECT * FROM cte;
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WITH RECURSIVE cte (n) AS (SELECT 1 UNION ALL SELECT n + 1 FROM cte LIMIT 10000) SELECT /*+ MAX_EXECUTION_TIME(1000) */ * FROM cte;
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WITH RECURSIVE fibonacci (n, fib_n, next_fib_n) AS (SELECT 1, 0, 1 UNION ALL SELECT n + 1, next_fib_n, fib_n + next_fib_n FROM fibonacci WHERE n < 10) SELECT * FROM fibonacci;
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WITH RECURSIVE dates (date) AS (SELECT MIN(date) FROM sales UNION ALL SELECT date + INTERVAL 1 DAY FROM dates WHERE date + INTERVAL 1 DAY <= (SELECT MAX(date) FROM sales)) SELECT * FROM dates;
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WITH RECURSIVE dates (date) AS (SELECT MIN(date) FROM sales UNION ALL SELECT date + INTERVAL 1 DAY FROM dates WHERE date + INTERVAL 1 DAY <= (SELECT MAX(date) FROM sales)) SELECT dates.date, COALESCE(SUM(price), 0) AS sum_price FROM dates LEFT JOIN sales ON dates.date = sales.date GROUP BY dates.date ORDER BY dates.date;
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WITH RECURSIVE employee_paths (id, name, path) AS (SELECT id, name, CAST(id AS CHAR(200)) FROM employees WHERE manager_id IS NULL UNION ALL SELECT e.id, e.name, CONCAT(ep.path, ',', e.id) FROM employee_paths AS ep JOIN employees AS e ON ep.id = e.manager_id) SELECT * FROM employee_paths ORDER BY path;
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WITH cte AS (SELECT 1) SELECT * FROM cte;
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WITH cte1(txt) AS (SELECT "This "),
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cte2(txt) AS (SELECT CONCAT(cte1.txt,"is a ") FROM cte1),
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cte3(txt) AS (SELECT "nice query" UNION
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SELECT "query that rocks" UNION
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SELECT "query"),
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cte4(txt) AS (SELECT concat(cte2.txt, cte3.txt) FROM cte2, cte3)
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SELECT MAX(txt), MIN(txt) FROM cte4;
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WITH RECURSIVE my_cte AS (SELECT 1 AS n UNION ALL SELECT 1+n FROM my_cte WHERE n<10) SELECT * FROM my_cte;
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WITH RECURSIVE my_cte(n) AS (SELECT 1 UNION ALL SELECT 1+n FROM my_cte WHERE n<6) DELETE FROM numbers WHERE numbers.n > (SELECT AVG(n) FROM my_cte);
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WITH RECURSIVE my_cte AS (SELECT 1 AS n UNION ALL SELECT 1+n FROM my_cte WHERE n<10) SELECT * FROM my_cte;
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WITH RECURSIVE my_cte AS (SELECT 1 as f, 1 as next_f UNION ALL SELECT next_f, f+next_f FROM my_cte WHERE f < 500) SELECT * FROM my_cte;
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WITH RECURSIVE
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digits AS
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(
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SELECT '0' AS d UNION ALL SELECT '1'
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),
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strings AS
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(
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SELECT '' AS s
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UNION ALL
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SELECT CONCAT(strings.s, digits.d)
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FROM strings, digits
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WHERE LENGTH(strings.s) < 4
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)
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SELECT s FROM strings WHERE LENGTH(s)=4;
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WITH RECURSIVE
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digits AS
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(
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SELECT '0' AS d UNION ALL SELECT '1'
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),
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strings AS
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(
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SELECT CAST('' AS CHAR(4)) AS s
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UNION ALL
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SELECT CONCAT(strings.s, digits.d)
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FROM strings, digits
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WHERE LENGTH(strings.s) < 4
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)
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SELECT * FROM strings WHERE LENGTH(s)=4;
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WITH RECURSIVE cte AS
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(
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SELECT category_id, name FROM category WHERE parent IS NULL
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UNION ALL
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SELECT c.category_id, c.name FROM category c JOIN cte
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ON cte.category_id=c.parent
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)
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SELECT name FROM cte;
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WITH RECURSIVE cte AS
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(
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SELECT category_id, name, 0 AS depth FROM category WHERE parent IS NULL
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UNION ALL
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SELECT c.category_id, c.name, cte.depth+1 FROM category c JOIN cte ON
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cte.category_id=c.parent
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)
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SELECT * FROM cte ORDER BY depth;
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WITH RECURSIVE cte AS
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(
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SELECT category_id, name, CAST(category_id AS CHAR(200)) AS path
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FROM category WHERE parent IS NULL
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UNION ALL
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SELECT c.category_id, c.name, CONCAT(cte.path, ",", c.category_id)
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FROM category c JOIN cte ON cte.category_id=c.parent
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)
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SELECT * FROM cte ORDER BY path;
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WITH RECURSIVE cte AS
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(
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SELECT name, parent FROM category WHERE name='FLASH'
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UNION ALL
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SELECT c.name, c.parent FROM category c JOIN cte
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ON c.category_id=cte.parent
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)
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SELECT * FROM cte;
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WITH RECURSIVE cte AS
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(
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SELECT name, parent, 0 as depth FROM category WHERE name='FLASH'
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UNION ALL
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SELECT c.name, c.parent, cte.depth-1 FROM category c JOIN cte
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ON c.category_id=cte.parent
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)
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SELECT * FROM cte ORDER BY depth;
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WITH RECURSIVE cte AS
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(
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SELECT category_id, CAST(name AS CHAR(200)) AS name,
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CAST(category_id AS CHAR(200)) AS path,
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0 as depth
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FROM category WHERE parent IS NULL
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UNION ALL
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SELECT c.category_id,
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CONCAT(REPEAT(' ', cte.depth+1), c.name),
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CONCAT(cte.path, ",", c.category_id),
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cte.depth+1
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FROM category c JOIN cte ON
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cte.category_id=c.parent
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)
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SELECT * FROM cte ORDER BY path;
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WITH RECURSIVE cte AS
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(
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SELECT category_id, name,
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CAST(category_id AS CHAR(200)) AS path,
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0 as depth
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FROM category WHERE name='PORTABLE ELECTRONICS'
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UNION ALL
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SELECT c.category_id,
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c.name,
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CONCAT(cte.path, ",", c.category_id),
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cte.depth+1
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FROM category c JOIN cte
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ON cte.category_id=c.parent
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)
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SELECT * FROM cte ORDER BY path;
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WITH RECURSIVE cte AS
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(
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SELECT category_id, name, 0 as depth
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FROM category WHERE name='PORTABLE ELECTRONICS'
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UNION ALL
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SELECT c.category_id, c.name, cte.depth+1
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FROM category c JOIN cte
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ON cte.category_id=c.parent
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WHERE cte.depth=0
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)
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SELECT * FROM cte;
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WITH RECURSIVE cte AS
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(
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SELECT c.category_id, c.name AS cat_name, c.parent, p.name AS prod_name
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FROM category c JOIN product p ON c.category_id=p.category_id
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UNION ALL
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SELECT c.category_id, c.name, c.parent, cte.prod_name
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FROM cte JOIN category c ON c.category_id=cte.parent
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)
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SELECT cat_name, COUNT(*) AS prod_in_cat FROM cte
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GROUP BY cat_name;
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WITH RECURSIVE descendants AS (SELECT person FROM t1 WHERE person='Thurimbert' UNION ALL SELECT t.person FROM descendants d, t1 t WHERE t.parent=d.person) SELECT * FROM descendants;
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WITH RECURSIVE descendants AS (SELECT person, 1 as level FROM t1 WHERE person='Thurimbert' UNION ALL SELECT t.person, d.level+1 FROM descendants d, t1 t WHERE t.parent=d.person) SELECT * FROM descendants ORDER BY level;
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WITH RECURSIVE descendants AS (SELECT person, CAST(person AS CHAR(500)) AS path FROM t1 WHERE person='Thurimbert' UNION ALL SELECT t.person, CONCAT(d.path, ',', t.person) FROM descendants d, t1 t WHERE t.parent=d.person) SELECT * FROM descendants ORDER BY path;
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WITH RECURSIVE all_destinations AS (SELECT destination AS planet FROM rockets WHERE origin='Earth' UNION ALL SELECT r.destination FROM rockets r, all_destinations d WHERE r.origin=d.planet) SELECT * FROM all_destinations;
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WITH RECURSIVE all_destinations AS (SELECT destination AS planet FROM rockets WHERE origin='Earth' UNION ALL SELECT r.destination FROM rockets r, all_destinations d WHERE r.origin=d.planet) SELECT * FROM all_destinations;
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WITH RECURSIVE all_destinations AS (SELECT destination AS planet FROM rockets WHERE origin='Earth' UNION DISTINCT SELECT r.destination FROM rockets r, all_destinations d WHERE r.origin=d.planet) SELECT * FROM all_destinations;
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WITH RECURSIVE all_destinations AS (SELECT destination AS planet, trip_time AS total_time FROM rockets WHERE origin='Earth' UNION DISTINCT SELECT r.destination, d.total_time+r.trip_time FROM rockets r, all_destinations d WHERE r.origin=d.planet) SELECT * FROM all_destinations;
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WITH RECURSIVE all_destinations AS (SELECT destination AS planet, trip_time AS total_time, CAST(destination AS CHAR(500)) AS path FROM rockets WHERE origin='Earth' UNION ALL SELECT r.destination, d.total_time+r.trip_time, CONCAT(d.path, ',', r.destination) FROM rockets r, all_destinations d WHERE r.origin=d.planet AND FIND_IN_SET(r.destination, d.path)=0) SELECT * FROM all_destinations;
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WITH RECURSIVE all_destinations AS (SELECT destination AS planet, trip_time AS total_time, CAST(destination AS CHAR(500)) AS path, 0 AS is_cycle FROM rockets WHERE origin='Earth' UNION ALL SELECT r.destination, d.total_time+r.trip_time, CONCAT(d.path, ',', r.destination), FIND_IN_SET(r.destination, d.path)!=0 FROM rockets r, all_destinations d WHERE r.origin=d.planet AND is_cycle=0) SELECT * FROM all_destinations;
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