My query is picking a bad execution plan , how to fix it ?
Outdated Statistics: If the statistics on a table or index are outdated, the optimizer may choose a bad execution plan. For example, if you have a table with a large number of rows, but the statistics haven't been updated in a while, the optimizer may underestimate the number of rows and choose a less efficient execution plan. You can update statistics using the following command: UPDATE STATISTICS <table or index name> Query Hints: Query hints can be used to force the optimizer to use a particular execution plan. For example, if you have a query that uses a join, but the optimizer is choosing a nested loop join instead of a hash join, you can add a query hint to force the optimizer to use a hash join: SELECT * FROM table1 JOIN table2 ON table1.column1 = table2.column2 OPTION (HASH JOIN) Query Rewrite: Sometimes, rewriting a query can make it more efficient. For example, if you have a query that uses a subquery, but the optimizer is choosing to execute the subquery for every...
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