How to optimize this SQL query?
In case you have your own slow SQL query, you can optimize it automatically here.
For the query above, the following recommendations will be helpful as part of the SQL tuning process.
You'll find 3 sections below:
- Description of the steps you can take to speed up the query.
- The optimal indexes for this query, which you can copy and create in your database.
- An automatically re-written query you can copy and execute in your database.
The optimization process and recommendations:
- Avoid LIKE Searches With Leading Wildcard (query line: 13): The database will not use an index when using like searches with a leading wildcard (e.g. '%,'). Although it's not always a satisfactory solution, please consider using prefix-match LIKE patterns (e.g. 'TERM%').
- Create Optimal Indexes (modified query below): The recommended indexes are an integral part of this optimization effort and should be created before testing the execution duration of the optimized query.
Optimal indexes for this query:
CREATE INDEX tickets_idx_created_at ON Tickets (created_at);
CREATE INDEX users_idx_id ON Users (Id);
The optimized query:
SELECT
u.Id,
u.Name,
t.submitter_id,
t.description
FROM
Users u
JOIN
Tickets t
ON t.submitter_id = u.Id
WHERE
t.created_at BETWEEN '2017-11-01' AND '2018-08-23'
AND ',' + t.tags + ',' LIKE '%,' + 'ecr_administered' + ',%'