Answer / Pawan Kumar Tiwari

The validations performed on the source data depend on the specific database and the application. However, common validations include checking for null values, data type mismatches, duplicate records, and range checks. To eliminate junk data, you can use SQL queries with WHERE clauses to filter out unwanted records, or use data cleaning tools like Trim, RTRIM, LTRIM, and UPPER/LOWER functions.

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