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A database schema is a logical blueprint that outlines the structure and organization of a database, defining how data is stored, arranged, and related within the database management system. It includes the tables, fields, relationships, and constraints that collectively shape the architecture of a database, ensuring efficient data storage and retrieval.
In MySQL, TINYINT is a data type used to store small integer values. Let’s delve into its specifics and see how it compares to other integer types: TINYINT Comparison with Other Integer Types: Key Differences: When designing a database schema, choosing the appropriate integer type based on the expected range […]
In MySQL, there isn’t a native BOOLEAN data type. However, BOOLEAN it is an alias for TINYINT(1). When you define a column of type BOOLEAN, MySQL internally creates it as a TINYINT(1) column. In this context: For example, the following two table definitions are equivalent: When you insert values into […]
In MySQL, to create a column that is both AUTO_INCREMENT a PRIMARY KEY, you typically use it with integer types such as INT or BIGINT. The AUTO_INCREMENT attribute automatically generates a unique value for each new record, incrementing by one (or another specified value). The PRIMARY KEY constraint uniquely identifies […]
MySQL provides the DATE_ADD() and DATE_SUB() functions to perform date arithmetic. Here are some examples to illustrate their usage: 1. DATE_ADD() The DATE_ADD() function is used to add a specified time interval to a date. Syntax: Example: To add five days to the current date: To add three months to […]
We can use the SHOW EVENTS statement to list MySQL’s scheduled events by SQL. The syntax for the SHOW EVENTS statement is as follows: The schema_name parameter is optional. If you specify a schema name, the SHOW EVENTS statement will only list the scheduled events in that schema. The pattern […]