Capgemini SQL Developer Interview Questions, Process, and Tips

Data normalization is the process of organizing data in a database to reduce redundancy and improve data integrity.

• It involves breaking down a table into smaller tables and defining relationships between them.

• Normalization helps to eliminate data inconsistencies and anomalies.

• There are different levels of normalization, with each level having specific rules to follow.

• For example, first normal form (1NF) requires that e...read more

Query optimization techniques and types of schemas

• Query optimization techniques include indexing, query rewriting, and partitioning

• Schemas include user-defined, system-defined, and temporary schemas

• User-defined schemas are created by users to organize database objects

• System-defined schemas are created by the database management system

• Temporary schemas are used for temporary storage of data

• Differences between schemas in

Use SELECT DISTINCT statement to find unique values in a table.

• Use SELECT DISTINCT column_name FROM table_name

• DISTINCT keyword returns only unique values

• Can be used with multiple columns

• Can be combined with other SQL statements like WHERE and ORDER BY

To troubleshoot a stored procedure, check for syntax errors, run the procedure with test data, and use debugging tools.

• Check for syntax errors in the stored procedure code

• Run the procedure with test data to identify any logical errors

• Use debugging tools like SQL Server Profiler or Visual Studio Debugger to step through the code and identify issues

• Check for any database connectivity issues or permission errors

• Review the...read more