Case insensitive database query

I hope these case insensitive SQL SELECT query examples are helpful. Again, the trick is to convert whatever you’re searching for to uppercase or lowercase using the SQL upper and lower functions, and then make your search string match that case. The way to determine if a database or database object is to check its COLLATION property and look for CI or CS in the result. If the result of the query must return both upper and lower case records, the following changes must be made. NLS_COMP = LINGUISTIC and NLS_SORT = BINARY_AI.

If it is desired to be valid for all users, it can be changed as a parameter. If you only want to apply to specific users, you can do this with the database logon trigger. My vendor requires the data warehouse database to be case sensitive, but I need to do case - insensitive queries against it. In a case -sensitive database , how would you.

There are main ways to perform a case - insensitive search in Oracle without using full-text indexes. Case your column and your string identically. UNIQUE indexes on a column with a case sensitive collation allows to insert both ‘a’ and ‘A’.

If the collation is case insensitive , this is not allowed. For queries that don’t force a case sensitive or case insensitive collation, indexes can be used normally (be sure to understand which LIKE queries can use indexes, anyway). About Case-Insensitive and Accent-Insensitive Queries and Searches By default, queries and searches in Siebel Business Applications are sensitive to case and accent. If you perform a query or search, there is a match only if the search criteria you enter are capitalized and accented in the same way that the data is capitalized and accented in the Siebel database. Now with the latest release, Informix supports case - insensitive databases.

In this article, learn how to create a case - insensitive database and explore considerations for implementing check constraints, using distinct searches, using group-by aggregate queries , implementing distributed queries , and more, in a case - insensitive database environment. The UPPER and LOWER, case-conversion functions were designed to support case - insensitive queries in a case -sensitive database. They are less often needed in databases that have the NLSCASE INSENSITIVE attribute, because the NCHAR and NVARCHAR data types can support case - insensitive queries without calling these functions.

EFand PostqreSQL (npgsql) database. We try the following query in EF6: User user = Context. You can control it through applications as we are doing. We convert UPPER to all input fields in forms, any data that is stored is in upper case. Similarly we convert to upper for all search queries.

Once data is in upper we can always. The case-insensitive property applies to querying data. However, you cannot query on an attribute that is not based on a column. Can you explain in more detail what exacty goew wrong? Steven Davelaar, JHeadstart Team.

This is not quite true. The default collation for character set latin which is latin1_swedish_ci, happens to be case - insensitive. Oracle Database 12c Release (1) lets you specify the collation used for columns that hold string data, allowing you.