SQL UPPER() function
The SQL UPPER() function is used to convert all characters of a string to uppercase.
PostgreSQL, MySQL, SQL Server and Oracle
All of above platforms support the SQL syntax of UPPER().
Application of UPPER()
In the subsequent pages, we have discussed how to apply UPPER() with various SQL clauses. we have used Oracle 10g Express Edition.
To get string the 'testing for upper function' in upper case from the DUAL table, the following SQL statement can be used :
SELECT UPPER('testing for upper function') AS Testing_Upper FROM dual;
In the above example 'Testing_Upper' is a column alias which will come as a column heading to the output.
TESTING_UPPER -------------------------- TESTING FOR UPPER FUNCTION
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