SQL Concepts
SQL Concepts Quiz
Test your knowledge of SQL with our comprehensive quiz! Whether you're a beginner or looking to refresh your skills, this quiz covers essential SQL concepts.
- Understand primary and foreign keys
- Identify valid SQL data types and operators
- Enhance your SQL querying skills
Definition of a Primary Key
A Master Account With Unlimited Access to Data
A Unique Identifier Used To Identify an Entity
A Stored Procedure To Decrypt Sensitive Data
A Backdoor to Access a DataBase
What Will This Statement Return.... "Select * From MyTable Where Myfield Not = 1"?
All the data in all the columns in MyTable
All the data in all the columns from MyTable where MyField does not equal 1
Nothing, will return syntax error
The first 1000 from MyTable where MyField does not equal 1
What is the proper syntax to join all the records in a table, assuming both have a column sharing the same values called OID?
Select Table1.OID, Table1.Col2,Table1.Col3, Table2.OID,Table2.Col1,Table2.Col2,Table3.Col3 inner join on Table1.OID=Table2.OID, DBName.dbo.Table2 from DBName.dbo.Table1
Select Table1.OID, Table1.Col2,Table1.Col3, Table2.OID,Table2.Col1,Table2.Col2,Table3.Col3 on Table1.OID=Table2.OID inner join DBName.dbo.Table2 from DBName.dbo.Table1
Get Table1.OID, Table1.Col2,Table1.Col3, Table2.OID,Table2.Col1,Table2.Col2,Table3.Col3 from DBName.dbo.Table1 inner join on DBName.dbo.Table2 = Table1.OID =Table2.OID
Select Table1.OID, Table1.Col2,Table1.Col3, Table2.OID,Table2.Col1,Table2.Col2,Table3.Col3 from DBName.dbo.Table1 inner join DBName.dbo.Table2 on Table1.OID=Table2.OID
Why must a primary key be unique?
To Avoid Redundancy
To Avoid Duplication
To Preserve Integrity
All Of the Above
What is a foreign key?
A password from another DB that works in this DB
A vulnerability gleaned from another db
A primary key used as a reference in a different table than the entity it represents
A key defined in another language
Select the Valid Operators in SQL
>
<
==
<>
Is
Is not
=
++
-
+
--
Like
Div
In
Contains
/
/%
Round
Sqroot
Avg
Not =
Is null
What is the number one reason to avoid redundancy or replication in a db?
Integrity, so that one record is represented by one key
To prevent the database from being unnecessarily large
To keep data easily organized
To make data easier to understand
What Does SQL Stand For?
Simple Query Language
Structured Query Language
Stanley Quintin Larsen (inventor)
Simple Question Language
What is the definition of a Subquery?
A query inside of a query
A query that returns a smaller set of data than its parent
A Query that can be substituted for another
A query that pulls from a table deeper in the data structure
Bonus What Question did you find the most difficult?
Definition of a Primary Key
What Does SQL Stand For?
What is the definition of a Subquery?
What is the number one reason to avoid redundancy or replication in a db?
Select the Valid Operators in SQL
What is a foreign key?
Why must a primary key be unique?
What is the proper syntax to join all the records in a table, assuming both have a column sharing the same values called OID?
What Will This Statement Return.... "Select * From MyTable Where Myfield Not = 1"?
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