Add sql tables

sql/data_inserts.sql

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+-- insert one ROW
+-- insert multiple ROWS
+
+INSERT INTO employers
+(name)
+VALUES
+("MaxwellHealth"),
+("WeSpire");
+
+SELECT *
+FROM employers;
+
+DELETE
+FROM employers
+WHERE name = "MaxwellHealth";
+-- WHERE id = 11
+
+INSERT 
+INTO employers
+(name)
+VALUES
+("MaxwellHealth"),
+("WeSpire"),
+("Adrian"),
+("Annabelle");
+
+SELECT id, name
+FROM employers
+WHERE name LIKE '%ax%';
+
+INSERT INTO members (employedId, name)
+VALUES
+
+(1, "Michael"),
+(1, "Darryl");
+
+SELECT employers.name, members.name
+FROM employers
+JOIN members
+ON employers.id = members.employedId;
+

sql/dates.sql

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+SELECT NOW();
+
+SELECT SYSDATE();
+
+SELECT CURDATE();
+
+SELECT NOW(), SYSDATE(), CURDATE();

sql/employers.sql

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+-- id and name columns
+-- id INT
+-- name VARCHAR
+-- PK to define primary key
+
+CREATE TABLE
+IF NOT EXISTS employers
+(
+    id INT AUTO_INCREMENT NOT NULL,
+    name VARCHAR(225) NOT NULL UNIQUE,
+    PRIMARY KEY (id)
+);

sql/group_by.sql

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+-- get a count of numbers by employer
+
+SELECT employers.name, count(members.name) AS member_count
+FROM employers
+JOIN members
+ON employers.id = members.employedId
+GROUP BY employers.name

sql/members.sql

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+CREATE TABLE
+IF NOT EXISTS members
+(
+    id INT AUTO_INCREMENT NOT NULL,
+    name VARCHAR(225) NOT NULL UNIQUE,
+    employedId INT,
+    PRIMARY KEY (id),
+    FOREIGN KEY (employedId) REFERENCES employers (id)
+);

sql/order_by.sql

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+SELECT *
+FROM members
+ORDER BY name;
+
+SELECT employers.name, employers.id,
+    members.name, members.id
+FROM employers
+JOIN members
+ON employers.id = members.employedId
+ORDER BY employers.name, members.name

sql/strings.sql

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+-- mid
+-- left
+-- right
+-- upper
+-- lower
+-- concat
+
+
+-- using the mid, give me the index char of these positions
+SELECT MID("TEST", 1,2)
+
+-- first 3 char
+SELECT LEFT("LONG STRING", 3)
+
+SELECT UPPER(members.name) AS name
+FROM members
+
+SELECT CONCAT(members.name, " is awesome.") AS name
+FROM members

sql/where.sql

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+
+SELECT employers.name, members.name
+FROM employers
+JOIN members
+ON employers.id = members.employedId
+WHERE members.name = 'Rory';
+
+SELECT employers.name, members.name
+FROM employers
+JOIN members
+ON employers.id = members.employedId
+WHERE employers.name = 'MaxwellHealth';
+
+SELECT employers.name, employers.id,
+    members.name, members.id
+FROM employers
+JOIN members
+ON employers.id = members.employedId
+-- WHERE employers.name = 'MaxwellHealth';
+
+SELECT employers.name, employers.id,
+    members.name, members.id
+FROM employers
+JOIN members
+ON employers.id = members.employedId
+WHERE employers.id = 1;
+
+SELECT employers.name, employers.id,
+    members.name, members.id
+FROM employers
+JOIN members
+ON employers.id = members.employedId
+WHERE members.id = 51;
+
+SELECT employers.name, employers.id,
+    members.name, members.id
+FROM employers
+JOIN members
+ON employers.id = members.employedId
+WHERE members.name LIKE '%or%';
+
+INSERT INTO members (employedId, name)
+VALUES
+(1, "Rory"),
+(1, "Julie"),
+(1, "Kyle"),
+(1, "Jerry"),
+(1, "George"),
+(1, "Michael"),
+(1, "Darryl");
+
+SELECT *
+FROM employers;
+