As of **November 2019**, in [!INCLUDE[ssSDSfull](../../includes/sssdsfull-md.md)], the default compatibility level is 150 for newly created databases. [!INCLUDE[msCoName](../../includes/msconame-md.md)] does not update database compatibility level for existing databases. It is up to customers to do at their own discretion. [!INCLUDE[msCoName](../../includes/msconame-md.md)] highly recommends that customers plan to upgrade to the latest compatibility level in order to leverage the latest query optimization improvements.
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