TIMESTAMP and YEAR Types
Welcome back to this series on working with dates and times in MySQL. In the first two installments, we're looking at MySQL's temporal data types. Part 1 covered the DATE, TIME, and DATETIME data types, while this installment will cover the remaining TIMESTAMP and YEAR types.
DATE, TIME, and DATETIME Types
The vast majority of databases store a great deal of "temporal" data. Temporal data is simply data that represents a state in time. An organization may collect temporal data for a variety of reasons, such as to analyze weather patterns and other environmental variables, monitor traffic conditions, study demographic trends, etc. Businesses also routinely need to store temporal data about when orders were placed, stock refilled, staff hired, and a whole host of other information about their day-to-day business.
Back in May of 2021, we examined a few of SQL Server's Important SQL Server Functions. Now, it's time to turn our attention to MySQL to see what it offers us in terms of math and numeric functions. To see how they work in practice, we'll use them in queries that we'll run in Navicat 16 for MySQL.
One of the key ingredients to writing effective SQL queries is the ability to articulate a wide variety of conditions using SQL syntax. One condition that gives both newbies and experienced database developers pause for thought is the Exclusive OR. Software programmers tend to be more familiar with the syntax for the Exclusive OR condition, probably because most programming languages support the XOR logical operator, whereas many databases do not.
In simple terms, the Exclusive OR condition is similar to the regular OR, except that, in the case of the Exclusive OR, only one of the compared operands may be true, and not both. In this blog, we'll learn how to express an Exclusive OR condition for a variety of databases, whether they support the XOR operator, or not.
Recently, we learned how to generate test data using Navicat 16's new Data Generation tool. It can help produce a large volume of complex testing data over multiple related tables, all guided by a multi-step wizard. In today's follow-up, we'll go through the process of creating a MySQL test database - all using Navicat 16.
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