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оқуды бастаңыз
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WHERE GROUP BY HAVING ORDER BY [ASC][DESC] LIMIT OFFSET
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оқуды бастаңыз
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SELECT col1 FROM table1 UNION SELECT col1 FROM table2
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złączenie tabel część wspólna оқуды бастаңыз
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SELECT * FROM tab1 NATURAL JOIN tab2 SELECT * FROM tab1 t1 JOIN tab2 t2 ON t1. kol1 = t2. kol2
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złączenie tabel suma tablie lewej z częścią wspólną obu tabel оқуды бастаңыз
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SELECT * FROM tab1 NATURAL LEFT JOIN tab2 SELECT * FROM tab1 t1 LEFT JOIN tab2 t2 ON t1. kol1 = t2. kol3
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Ilość wartości – zlicza NULL Ilość unikatowych wartości wyrażenia оқуды бастаңыз
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count(*) count(distinct wyrażenie)
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оқуды бастаңыз
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CREATE [OR REPLACE] VIEW view_name AS SELECT
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оқуды бастаңыз
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ALTER VIEW nazwa_widoku as SELECT
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оқуды бастаңыз
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inicjalizacja zmiennej oraz odwołanie оқуды бастаңыз
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SET @zmienna = 10 SELECT @zmienna
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оқуды бастаңыз
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Delimiter // create or replace function nazwa (arg1 typ) Begin ... End // Delimiter
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оқуды бастаңыз
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оқуды бастаңыз
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create procedure nazwa(IN zmiennaWE typ, OUT zmiennaWY typ, INOUT zmienna WEWY)
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оқуды бастаңыз
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call nazwa(zmiennaWE, zmiennaWY)
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оқуды бастаңыз
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begin declare v int set v=0 pętla End
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оқуды бастаңыз
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WHILE v < 5 DO ... END WHILE
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оқуды бастаңыз
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znacznik: LOOP ... IF v < 5 THEN. LEAVE znacznik END IF END LOOP
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оқуды бастаңыз
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REPEAT ... UNTIL v < 5. END REPEAT
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оқуды бастаңыз
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After/before delete/insert/update
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оқуды бастаңыз
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create triger name_triger before update ON employees. FOR EACH ROW begin. update employee set...
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оқуды бастаңыз
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grant all privileges ON DBname.* TO 'username' @ 'localhost'
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оқуды бастаңыз
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SELECT user, host FROM mysql. user
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оқуды бастаңыз
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create user 'username'@'localhost' identified by 'password'
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nadaj wszystkie uprawnienia оқуды бастаңыз
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grant ALL PRIWILEGES on name_db.* to 'username'@'localhost'
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nadaj uprawnienia do kolumny name оқуды бастаңыз
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grant SELECT (name) on name_db.* to 'username'@'localhost'
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оқуды бастаңыз
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grant SELECT, UPDATE, DELETE, INSERT on name_db.* to 'username'@'localhost'
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оқуды бастаңыз
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show grants for 'username'@'localhost'
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оқуды бастаңыз
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zamknięcie połączenia z bazą danych оқуды бастаңыз
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