Drill Consider the following tables with the following fields: Student: FName, LName, StudentID, Age, Yr, Course Grades: ID, P1, P2, P3 1.Display the first and last name of all freshman 2.Display the ID of anyone who is failing a class. 3.Display the ID of anyone is failing all three classes. 4.Display all fields of all freshmen who are under 15 and all seniors who are over Display all upperclassmen who are in A course whose last name starts with ‘P’ 6.Display all students whose last name starts with S, that are between 15 and 19.

Drill Consider the following tables with the following fields: Student: FName, LName, StudentID, Age, Yr, Course Address: StudentID, StreetAddress, City, State, Zip HonorRoll: StudentID, GPA 1.Display the first and last name of all students in the Zip 2.Display the LastName and GPA of all Seniors on the Honor Roll 3.Display the cities where each student lives. (list each city once) 4.Display (alphabetically) the last names of all underclassmen. 5.Display the min, max, average of GPA, and total number of honor roll students.(use headers: lowest, highest, average, and total) 6.Display the Last Name and GPA of all students who live in ‘Md’. (hint: you need a join with 3 tables)

Drill #2 (classwork will be collected) Consider the following tables with the following fields: Student: FName, LName, StudentID, Age, Yr, Course Address: StudentID, StreetAddress, City, State, Zip HonorRoll: StudentID, GPA 1.Display the first and last name of all students who live in Baltimore and are older than Display the LName and GPA of all ‘A’ Course on the Honor Roll w/ a GPA between 3.8 and 4.0 whose last name starts with ‘P’. 3.Display the LName and GPA of all ‘B’ Course students in the zip (hint: you need a join with 3 tables)

Classwork Create a table called CLASS with the fields: ClassName Not Null Size (Number) Null Teacher (Max 20) Not Null Department (Max 20) Not Null Course (‘A’ or ‘B’) Null

Joins

Keys: Primary Key

Keys: Foreign Key

Joins

Dot Notation Use dot notation when performing a join between two tables with the same column names.

Classwork Consider the following tables with the following fields: Student: FName, LName, StudentID, Age, Yr, Course Grades: StudentID, P1, P2, P3 1.Display the full name of all freshman who are failing first period. 2.Display the grades of any student whose name starts with ‘S’.

Distinct

DISTINCT and ORDER BY SELECT DISTINCT [field],.. [field] FROM [table1], [table2] WHERE [condition],.., [condition] ORDER BY [field],.., [field] This will only return unique values for the “DISTINCT”

What does this query do?

SELECT DISTINCT [Field] alias,.. [Field] FROM [Table1] alias, [Table2] alias WHERE [condition] IN {SELECT … } ORDER BY [Field],.. [Field]

SUM, AVG, MIN, MAX, COUNT

SUM, AVG

MIN

COUNT(*)

CREATE Table

CREATE TABLE Tablename ( Field1 datatype [not null OR null],.. Fieldn);

DataTypes

ALTER TABLE

ALTER TABLE ADD ALTER TABLE ADD (field datatype);

INSERT

INSERT INTO …VALUES INSERT INTO [table] VALUES (field1, field2…);

DELETE

UPDATE/SET

GROUP BY Use the GROUP BY Function with Agregate functions (SUM, MIN, MAX, AVG, COUNT) What do you think this query does?

GROUP BY/ HAVING To put conditions on a GROUP BY use the HAVING

Subqueries A subquery is a query within a query. They are general used in the WHERE (condition) statement. SELECT LName FROM Student WHERE StudentID IN (SELECT StudentID FROM HonorRoll);

What does the following SQL statement do?

Entity Relationship Model

SQL so far SELECTDISTINCT, Alias, dot notation FROM Table Alias, (Joins) WHERE IN, IN (SELECT …), BETWEEN AND, Field <> != >= <= Functions: Min(), Max(), Sum(), Avg(), Count(*) Tables: Create, Alter, Insert, Delete, Update