Mysql where with two conditions

When combining these conditions , it is important to use parentheses so that the database knows what order to evaluate each condition. However, given how the conditions are re-used in your UPDATE statement, you could also take a different approach altogether: represent the affected IDs and the new values as a derived. The SQL WHERE clause is used to restrict the number of rows affected by a SELECT, UPDATE or DELETE query. These clauses may be used in two ways: as AND clauses or as OR.

An operator is a special keyword used to join or change clauses within a WHERE clause. It is also known as logical operators. You can specify more than one condition using the AND or the OR operators. A WHERE clause can be used along with DELETE or UPDATE SQL command also to specify a condition.

The WHERE clause works like an if condition in any programming language. Ask Question Asked years, months ago. So if you want AND condition for multiple lines, first you must create one line from multiple lines, like this.

SELECTING with multiple WHERE conditions. The instructions for the setup can be found in How to add comments in simple SQL selects. Follow steps through in this topic before proceeding to the next step. Where clause problem with multiple conditions. The fields used are needed and has_been_read.

It means, SELECT Statement will return the records only If the condition specified after the WHERE keyword is TRUE. Selecting Multiple Rows in One Query with Multiple Conditions. Active years, months ago. I can select multiple rows with one condition by using something like:. MySQL Forums Forum List Newbie.

For example, is it possible to merge the following two UPDATE statements into one? The best way in your particular case would just be to change your two criteria to one criterion:. Comparing two values in the same row and change if needed. You can use the AND and OR operators to combine two or more conditions into a compound condition.

It’s time to discover how to implement multiple conditions by using AND and OR in our queries. AND and OR are used in a very large amount of statements, especially user authentication. We have to check a username and a password.

If you are familiar with programming logic, this tutorial will be a piece of cake for you. The CASE statements make the code more readable and efficient. Combine two conditions in Having clause.

Trigger with multiple IF conditions. This person is a verified professional. Verify your account to enable IT peers to see that you are a professional. Next: Drupal two databases with same.

When LIKE is used along with sign then it will work like a meta character. SQL is a language that is generic to all database platforms. Using IN (1854) should work anywhere.

Just change the name of the table and the field.