You can see, now case sensitive search is performed on column name and returns exact match for search values. ![]() Lets execute the below queries and see the output. Now you can use simple query to search for case sensitive value for column Name. You can see, now column collation has been changed to case Sensitive Latin1_General_CS_AS.ĬS in Latin1_General_CS_AS represents Case Sensitive. Lets check, whether the column collation is changed or not, by executing same query that we used above to check collation for all columns in a SQL Server table. Lets use Alter Command to change the column Name collation from case insensitive to case sensitive. You can also make column case sensitive by changing column’s collation from case insensitive SQL_Latin1_General_CP1_CI_AI to case sensitive Latin1_General_CS_AS. Means this time case sensitive is applied on column Name. WHERE COLLATE Latin1_General_CS_AS = 'abc'Īnd you can see the output of query, it returns all single records which is exact match with search value ‘abc’. To make query case sensitive and return only ‘abc’ from table, you can modify above query as following SELECT * FROM dbo.DumpData WHERE TABLE_NAME = 'DumpData' AND CHARACTER_SET_NAME IS NOT NULLĪs you can see, the colloation for column Name is Latin1_General_CI_AI, which is case insensitive.ĬI in Latin1_General_CI_AI represents case insensitive. Lets check the collation for column Name, using following query that check the collation for all columns in a SQL Server database table. It happens because of default Collation of the SQL Server installation that is SQL_Latin1_General_CP1_CI_AI, that is not case sensitive. It means case senstivitiy is not checked on column so query returns all records contains ‘abc’ only, does not matter whether it is in upper case, lower case, or mix. Right-click on the column and from the context menu, select the Safe rename command: To see the changes that will be executed, click Preview button in the Safe rename column window. In the Object Explorer/Server Explorer, navigate to a table or view column that want to rename. While for ‘abc’ there are only single record in table. Open SQL Server Management Studio or Visual Studio. You can see for search value ‘abc’, it returns seven matching values which are either in upper case, lower case or mix. Lets see, what happens when you execute the following query. Basically you want case sensitive search that returns exact matching records from table. Suppose you want to see only those names that have exact match with value ‘abc’, as all characters in ‘abc’ are in lower case, so you want to see all name which contains values ‘abc’ in lower case. ![]() Now we have a table, and you can see the table output as shown below that contains some string values with upper case, some in lower case or some values are combine of upper and lower characters. ![]() Lets prepare a sample table called DumpData, and insert few records as shown below. How to change the Collation of table column to Case insensitive or Case sensitive?
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |