exercicios de aprofundamento SQL

modulo4/aprofundamento-sql/Exercicios.md

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+SELECT * FROM Actor;
+SELECT * FROM Movies;
+
+#   Ex1-a)
+# ALTER TABLE Actor DROP COLUMN salary;
+# Exclui a Coluna
+
+
+
+#   Ex1-b)
+# ALTER TABLE Actor CHANGE gender sex VARCHAR(6);
+# Altera Tabela de gender pra sex e só pode receber uma string de 6 caracteres.
+
+
+
+#   Ex1-c)
+# ALTER TABLE Actor CHANGE gender gender VARCHAR(255);
+# Altera a Coluna Gender pra receber uma string de ate 255 caracteres
+
+
+
+#   Ex1-d)
+ALTER TABLE Actor CHANGE gender gender VARCHAR(100);
+#
+
+#   Ex2-a)
+UPDATE Actor SET name = "Fulana de Tal", birth_date = "1999-11-21" WHERE id = "002";
+
+#   Ex2-b)
+UPDATE Actor SET name ="JULIANA PAES" WHERE id = "005";
+UPDATE Actor SET name ="Juliana Paes" WHERE id = "005";
+
+#   Ex2-c)
+UPDATE Actor SET name ="JULIANA PAES", salary="100000000", birth_date= "2000/01/12"   WHERE id = "005";
+
+#   Ex2-d)
+UPDATE Actor SET name ="JULIANA PAES", salary="100000000", birth_date= "2000/01/12", cel="sam"  WHERE id = "005";
+# Unknown column 'cel' in 'field list'	
+# Coluna desconhecida 'cel' na 'lista de campos'
+
+#   Ex3-a)
+DELETE FROM Actor WHERE name = "Fernanda Montenegro";
+SET SQL_SAFE_UPDATES = 0; 
+# comando sql para desbloquear função fazer M no estagiario -------------------------
+
+#   Ex3-b)
+DELETE FROM Actor WHERE gender = "male" AND salary > 1000000;
+SET SQL_SAFE_UPDATES = 0;
+# comando sql para desbloquear função fazer M no estagiario -------------------------
+
+#   Ex4-a)
+SELECT MAX(salary) FROM Actor;
+
+#   Ex4-b)
+SELECT MIN(salary) FROM Actor where gender = "female";
+
+#   Ex4-c)
+SELECT COUNT(*) FROM Actor WHERE gender = "female";
+
+#   Ex4-d)
+SELECT AVG(salary) FROM Actor;
+
+#   Ex5-a)
+SELECT COUNT(*), gender FROM Actor GROUP BY gender;
+# Esse Comando numera quantos Atores tem em cada genero.
+
+#   Ex5-b)
+SELECT id FROM Actor ORDER BY name;
+
+#   Ex5-c)
+SELECT * FROM Actor ORDER BY salary;
+
+#   Ex5-d)
+SELECT * FROM Actor ORDER BY salary DESC LIMIT 3;
+
+#   Ex5-e)
+SELECT  AVG(salary) FROM Actor GROUP BY gender;
+
+
+#   Ex6-a)
+	ALTER TABLE Actor ADD playing_limit_date VARCHAR(255) DEFAULT "NotRegister";
+
+
+#   Ex6-b)
+ALTER TABLE Movies CHANGE rating rating DOUBLE;
+
+
+#   Ex6-c)
+UPDATE Movies SET launch_date="2022-09-10" Where id = "004";
+UPDATE Movies SET launch_date="2012-09-12" WHERE id = "002";
+SELECT * FROM Movies;
+
+#   Ex6-d)
+DELETE FROM Movies WHERE id = "001";
+UPDATE Movies SET sinopse = "nova sinopse" WHERE id = "001";
+#não entendi, o dado é guardado mas não sei pra onde vai...