Zoho Oracle SQL and PLSQL Developer Interview Questions, Process, and Tips

Without commit in pragma procedure, changes will not be permanently saved in the database.

• Changes made in the procedure will not be saved to the database permanently.

• Other sessions will not be able to see the changes until a commit is issued.

• Rollback will discard any changes made in the procedure without commit.

SQL is the language used for managing and manipulating databases.

• SQL stands for Structured Query Language

• It is used to communicate with databases to perform tasks like querying data, updating records, and creating tables

• Examples of SQL commands include SELECT, INSERT, UPDATE, and DELETE

Yes, it is possible to perform DML (Data Manipulation Language) operations on a view in Oracle SQL.

• DML operations such as INSERT, UPDATE, and DELETE can be performed on a view in Oracle SQL.

• The view must be updatable, meaning it must meet certain criteria such as having a key-preserved table in the FROM clause.

• Changes made to the view will affect the underlying base tables.

• For example, you can insert data into a view t...read more

Common null handling functions in Oracle SQL and PLSQL.

• NVL function replaces null values with a specified default value.

• NVL2 function returns one value if a specified expression is not null, otherwise returns another value.

• NULLIF function returns null if two expressions are equal, otherwise returns the first expression.

• COALESCE function returns the first non-null expression in a list of expressions.