SQL And PL/SQL Book For Beginners

  A simplified quickstart beginner's guide to learn the fundamentals of SQL & PL/SQL THE BEST SQL & PL/SQL QUICKSTART BOOK FOR B...

The UPPER function is contrary to the LOWER function and returns all characters in uppercase letters as shown in the following statement wh...

Every DBMS allows you to store date and time values in tables using specific date data types and in specific formats. Each implementation ...

The SUBSTR function returns specified characters from character value, starting from P, L characters long.  The following statement fetche...

When you query a table, the null values stored in a column (e.g commission_pct) are shown as (null). Using the NVL function, you can repla...

The LOWER function returns character, with all letters lowercase. The example presented below transforms all data in first name and job id...

The LENGTH function returns the length of character. Note that it is a character function that returns the answer in numbers, as shown in ...