MySQL(5.7.26) query optimization, why select * is much faster that select id in my leading wildcard ...

postgresql query taking 3 min to execute ,how can i reduce the time to within 60 seconds...

EXPLAIN ANALYZE within PL/pgSQL gives error: "query has no destination for result data"...

What does Type "ref|filter" mean in mariaDB Explain Output...

MariaDB does not select according to partition on partitioned table...

Postgresql explain analyze actual time not adding up...

What does MySQl explain Extra "Using where" really mean?...

What is the "filtered" column in MySQL EXPLAIN telling me, and how can I make use of it?...

Postgres: (how) can I output EXPLAIN <query> to a file?...

Does index range scan cause 'Using index condition'?...

Postgresql output EXPLAIN ANALYZE to file...

Multiple MATCH-AGAINST clauses results in no FULLTEXT index being used...

MariaDB very simple MATCH-AGAINST query not using FULLTEXT index?...

Misunderstanding about postgresql temp files...

What is DEPENDENT UNION in select_type column from explain command?...

Why does Mysql change query execution plan based on query parameters?...

How do I use DB2 Explain?...

index is used with SELECT COUNT(1) but not with SELECT *...

Is it possible to modify data with an SQL statement that starts with `EXPLAIN EXTENDED ...`?...

Explain Plan in PostgreSQL does not execute when provided with placeholders unlike Oracle...

What does eq_ref and ref types mean in MySQL explain...

How to execute an `explain select` on a laravel builder...

SQLite: optimize query with union...

Unnest (pivot) arrays in Postgres pg_stats view...

What does Using join buffer (Block Nested Loop) mean with EXPLAIN mysql command in the Extra column?...

Postgresql - is setting max_parallel_workers_per_gather higher could even make query slower?...

Understanding SQL EXPLAIN on a JOIN query...

EXPLAIN (ANALYZE, SETTINGS) display wrong tablespace parameters...

Why EXPLAIN SQL result for KEY is NULL...

EXPLAIN ANALYZE not working with ALTER TABLE...