taehyun (20231112): SQL 레벨업 3-4장

Document/2023/1112/taehyun/Dockerfile

@@ -0,0 +1,8 @@
+FROM mysql:5.7
+
+ENV MYSQL_ROOT_PASSWORD=root
+ENV MYSQL_DATABASE=test_group_by
+
+COPY ./query.sql /docker-entrypoint-initdb.d/
+
+CMD ["--max_allowed-packet=32505856"]

Document/2023/1112/taehyun/query.sql

@@ -0,0 +1,44 @@
+CREATE DATABASE IF NOT EXISTS test_group_by DEFAULT CHARACTER SET utf8mb4;
+
+USE test_group_by;
+
+CREATE TABLE IF NOT EXISTS Items1 (
+    item_id INTEGER NOT NULL,
+    year INTEGER NOT NULL,
+    item_name VARCHAR(255) NOT NULL,
+    price INTEGER NOT NULL,
+
+    PRIMARY KEY (item_id, year)    
+);
+
+CREATE TABLE IF NOT EXISTS Items2 (
+    item_id INTEGER NOT NULL,
+    year INTEGER NOT NULL,
+    item_name VARCHAR(255) NOT NULL,
+    price INTEGER NOT NULL,
+
+    PRIMARY KEY (year, item_id)
+);
+
+DELIMITER $$
+CREATE PROCEDURE CreateItem(IN fixed_item_id INT, IN fixed_item_name VARCHAR(255))
+BEGIN
+    DECLARE current_year INT DEFAULT 1;
+    DECLARE current_price INT DEFAULT 10;
+
+    WHILE current_year <= 1000000 DO
+        INSERT INTO Items1 (item_id, year, item_name, price) VALUES (fixed_item_id, current_year, fixed_item_name, current_price);
+        SET current_year = current_year + 1;
+        SET current_price = current_price + 10;
+    END WHILE;
+END $$
+DELIMITER ;
+
+CALL CreateItem(101, '머그컵');
+CALL CreateItem(102, '티스푼');
+CALL CreateItem(103, '나이프');
+
+INSERT INTO Items2 (item_id, year, item_name, price)
+SELECT item_id, year, item_name, price FROM Items1;
+
+