Technical Interview Questions
PL/SQL is an extension of SQL. While SQL is non-procedural, PL/SQL is a procedural language designed by Oracle. It is invented to overcome the limitations of SQL. PL/SQL (Procedural Language/Structured Query Language) is a programming language designed specifically for managing and manipulating Oracle databases. The purpose of using PL/SQL includes: Database Interaction: PL/SQL is primarily … Read more
PL/SQL stands for procedural language extension to SQL. It supports procedural features of programming language and SQL both. It was developed by Oracle Corporation in early of 90’s to enhance the capabilities of SQL. PL/SQL stands for Procedural Language/Structured Query Language. It is a powerful programming language that extends SQL (Structured Query Language) by adding … Read more
The DISTINCT keyword is used to ensure that the fetched value is only a non-duplicate value. The DISTINCT keyword is used to SELECT DISTINCT, and it always fetches different (distinct) from the column of the table. The DISTINCT keyword in SQL is used to eliminate duplicate records from the result set of a SELECT query. … Read more
The syntax of COALESCE function: COALESCE(exp1, exp2, …. expn) The COALESCE function is used to return the first non-null expression given in the parameter list. The COALESCE function in SQL is used to return the first non-null expression among its arguments. It takes multiple arguments and returns the first non-null expression from the list. Here … Read more
The MOD function returns the remainder in a division operation. In SQL, the function used to return the remainder in a division operation is the MOD function. The MOD function calculates the remainder of one number divided by another. Here’s an example: SELECT MOD(10, 3) AS Remainder; In this example, the result would be 1 … Read more