Star schema contains the dimesion tables mapped around one or more fact tables.

It is a denormalised model.

No need to use complicated joins.

Queries results fastly.

Snowflake schema

It is the normalised form of Star schema.

contains indepth joins ,bcas the tbales r splitted in to many pieces.We can easily do modification directly in the tables.

We hav to use comlicated joins ,since we hav more tables .

There will be some delay in processing the Query .

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