You can also use row-values to update multiple columns in a table, when the newĭata is derived from a subquery. It is in PostgreSQL the keyword ILIKE can be used instead of LIKE to make the match case-insensitive according to the active locale. Just to give you and idea how Tuple might be used. For example: SELECT storenames FROM stores WHERE states ILIKE IN (SELECT location FROM locations. Other ways to express this type of query would be to use a join today ())) # Find all events that correlate with the type and source of the # incidents that occured today. Because of the way SQL handles NULL, there are some special operations available. Here is how you might use some of these query operators:Ĭlass EventLog ( Model ): event_type = TextField () source = TextField () data = TextField () timestamp = TimestampField () class IncidentLog ( Model ): incident_type = TextField () source = TextField () traceback = TextField () timestamp = TimestampField () # Get a list of all the incident types and sources that have occured today. Let’s substitute LIKE with NOT LIKE in one of our earlier examples and see the effect. SQL LIKE Keyword Previous SQL Keywords Reference Next LIKE The LIKE command is used in a WHERE clause to search for a specified pattern in a column. SQL NOT LIKE SQL NOT LIKE behaves as you might expect, essentially returning the opposite of what the LIKE operator would. However, it can be used anywhere you use an expression in SQL. Its result include strings that are case-insensitive and follow the mentioned pattern. (User.is_active = True) & (User.is_admin = True) The LIKE operator is most commonly used in conjunction with the WHERE clause. The PostgreSQL ILIKE operator is used query data using pattern matching techniques. To combine clauses using logical operators, use: Operator Regular expression match (case-insensitive).Ĭoncatenate two strings or objects using ||.Ĭast the value of the column to the given type. Regular expression match (case-sensitive). Further, I often use conditions like WHERE something in (1,1,2,3,5,8,13,21) for better readability and flexibility of my SQL statements. The following types of comparisons are supported by peewee: Comparisonīecause I ran out of operators to override, there are some additional query In SQL I (sadly) often have to use ' LIKE ' conditions due to databases that violate nearly every rule of normalization.
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