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To remove all records from a table, use the following command:

DELETE FROM Students;

In MySQL, you can exit from a database by using the EXIT or QUIT commands.

21 st #Critical Thinking
INTERDISCIPLINARY LEARNING Century #Information Literacy
Skills

In science class, you are recording daily temperatures to study climate change. Complete the given tasks:
(a) Create a table named WeatherData with fields: Date, City, Minimum and Maximum Temperature.
(b) Insert the temperature data for your city for a week.

(c) Write SQL queries to show all data when the maximum temperature is above 38°C.
(d) Write SQL queries to show all data when the minimum temperature is above 24°C.

TECH
T ¢ ANSI SQL standard: A set of rules defined by the American National Standards Institute
E to ensure consistency and compatibility of SQL across different database systems.
R
M ¢ PRIMARY KEY: A field used to uniquely identify records in a database.
S
¢ FOREIGN KEY: A field in a table that refers to the primary key in another table.

REWIND RUN

« Data includes raw facts, figures or symbols that are yet to be processed into meaningful information.
« A database is defined as an organised collection of data that is stored and accessed electronically.
« A relational database is a type of database that stores data in the form of tables.

« A key is a column or a set of columns that helps us to identify records in a table.
« SQL enables us to store, retrieve and manipulate data in the form of tables.
« A data type defines the sort of value that a column will contain.
« SQL operators are used to perform operations on values in an SQL query.

« SQL constraints are used to define rules for table data.

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