Mysql like with multiple fields10/28/2023 The basic syntax of the WHERE clause looks like this: If the result of the expression is true, it satisfies the criteria of the search and will continue on for any further processing as a candidate row. If the result of the expression is false, the row will be removed from the results and will not be returned or continue to the next stage of processing. The WHERE clause works by specifying boolean expressions that are checked against each candidate row of data. If a record does not satisfy all of the conditions specified by the WHERE clause, it is not included in the query results. The WHERE clause provides a way of specifying the requirements that a record must meet to match the query. One of the most flexible and most common ways of specifying your data requirements is with the WHERE clause. Using the WHERE clause to define match criteria There are many different ways to filter queries in SQL and in this guide, we'll introduce some of the most common filtering options available for your MySQL databases: WHERE, GROUP BY, HAVING, and LIMIT.īy familiarizing yourself with these optional clauses, you can learn to construct queries that target the correct data, even in databases with many records. While the basic command allows you to specify the columns you want to display, the table to pull from, and the output format to use, much of the power of SELECT comes from its ability to filter results.įiltering queries allows you to return only the results that you're interested in by providing specific criteria that the records must match. The SELECT command is the primary means of retrieving data from a MySQL database.
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