Data Types
List 2 Data Types of SQL.
1. Integers
2. Char
3. VarChar
4. Decimal
5. Boolean
6. Date
TRUE OR FALSE: The Select-From-Where clause allows you to retrieve specific data from only one table based on specified conditions.
FALSE! (The Select-From-Where clause allows you to retrieve specific data from ONE OR MORE tables based on specified conditions.)
Explain what is Data Types in SQL.
In SQL, data types define the type of data that can be stored in a column of a table.
Give an example of VarChar mentioned within the presentation.
1. “Database”
2. “Purple”
3. “Country”
Aside from being generally used with the Select statement, what other statements can the Where Clause appear?
Delete and Update command statements
TRUE OR FALSE: Choosing a data type is not necessary for efficient data storage and retrieval.
FALSE! (Choosing the appropriate data type is CRUCIAL for efficient data storage and retrieval.)
Define the Boolean data type.
It represents Boolean values, typically used to store true/false or 0/1 values.
It is used for tracking whether a user's subscription to a service is active (TRUE) or inactive (FALSE).
When may it be necessary to qualify column names with table or view names?
When selecting from two or more tables having duplicate column names
The first SQL product,_______, was launched in 1979 by Relational Software, later known as Oracle Corporation.
ORACLE v2