Question: Why is data integration required in a data warehouse, more than in an operational application? When you join two tables on a common column (or

Why is data integration required in a data warehouse, more than in an operational application?

When you join two tables on a common column (or field), what is the effect in the results set, when the value of the column is a NULL value?

List three ways that Star Schemas and Snowflake Schemas are similar.

List three ways that OLTP Schemas and Databases are DIFFERENT than Star Schemas.

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