For example, if you wanted to search for descriptions that contained the string 20-30%, you wouldn’t want to interpret the % as a wildcard character. You can search for patterns that include one or more wildcard characters using the ESCAPE clause. A pattern may include regular characters and. WHERE c.description LIKE "%ruit pudding%" The SQL Server LIKE is a logical operator that determines if a character string matches a specified pattern. This example uses the wildcard to check if the description contains “Fruit pudding” or “fruit pudding”. You can prepend NOT keyword to negate the result return by LIKE condition. LIKE performs a case-sensitive match and ILIKE performs a case-insensitive match. This query will return all items with a description with a list that contains a section that starts with “Baby” and has any four letters and a comma afterwards. It searches for a pattern in entire string values provided in the input string. Here’s another example that uses the _ (underscore) to match a single character. Here’s a simple example that uses LIKE with the % wildcard character to return all items with a description that contains “cereal”. The bare expression lower(description) LIKE. Using LIKE, you can check if a string contains a specific pattern, including several different wildcard characters: Wildcard characterĪny single character within the specified range () or set ().Īny single character not within the specified range () or set (). The answer depends on many factors like Postgres version, encoding and locale - LCCOLLATE in particular. All sample queries in this doc can be run against a dataset that is preloaded on the Azure Cosmos DB Query Playground. In this blog, we will run some sample queries using the LIKE keyword. LIKE is a great addition to the existing string search system functions in Azure Cosmos DB: System functionĬhecks if a string contains a specific regular expressionĬhecks if a string contains a specific string valueĬhecks if a string equals a specific string valueĬhecks if a string starts with a specific string valueĬhecks if a string ends with a specific string value What can PostgreSQL do to speed up those operations and what can be done in general to first understand the problem and secondly to achieve better. One significant difference between LIKE / RLIKE and the full-text search predicates is that the former act on exact fields while the latter also work on. People use those things all over the place in their application and therefore it makes sense to approach the topic from a performance point of view. You can now use the LIKE keyword to do text searches in Azure Cosmos DB SQL (core) API! The LIKE keyword has been a top Azure Cosmos DB feature request and many use cases will see tremendous value from new string search options in Azure Cosmos DB.īy including the LIKE keyword in a WHERE clause, you can search for specific string patterns. LIKE and ILIKE are two fundamental SQL features.
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