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solve it correctly with drawings! Database optimizatio Consider a database with three relations: R ( A , B , D , E ) ; S
solve it correctly with drawings!
Database optimizatio Consider a database with three relations: ;;
Assume the following schemas and statistics for the relations.
Consider the following query:
SELECT
FROM
WHERE A and AND
AND AND AND
Draw the initial tree for this query, and then show how the query tree optimized
the heuristic rules.
Give the estimation cardinality each step your plan.n Exercise :
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