10 Questions
What is the purpose of SQL?
To access and modify information in the database
What does SQL stand for?
Structured Query Language
What is the difference between VARCHAR2 and VARCHAR data types?
VARCHAR2 can hold up to 4000 bytes, while VARCHAR can hold only 2000 bytes
What is the range of precision for the NUMBER data type?
1 to 38
What is the purpose of the DATE data type?
To store date and time values
What is the purpose of the CHAR data type?
The CHAR data type holds fixed length character data up to a specified width.
What is the difference between VARCHAR and VARCHAR2 data types?
The VARCHAR data type holds only 2000 bytes of data and occupies space for NULL characters, while VARCHAR2 does not occupy any space for NULL characters.
What is the maximum number of bytes that a VARCHAR2 value can contain?
A VARCHAR2 value can contain up to 4000 bytes of data.
What is the precision and scale of a NUMBER(5,2) data type?
The precision is 5, which represents the total number of places, and the scale is 2, which represents the number of places to the right of the decimal point.
What is the purpose of the RAW data type?
The RAW data type is used to store binary data of variable length up to a specified size.
Test your knowledge of SQL with this introductory quiz! Learn about the basics of Structured Query Language, data types, and more. Challenge yourself and see how well you understand this universal language used in relational database management systems.
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