Топ-100
 

DESCRIBE

База данных: MySQL
Текст

Syntax:
{EXPLAIN | DESCRIBE | DESC}
tbl_name [col_name | wild]

{EXPLAIN | DESCRIBE | DESC}
[explain_type]
{explainable_stmt | FOR CONNECTION connection_id}

{EXPLAIN | DESCRIBE | DESC} ANALYZE [FORMAT = TREE] select_statement

explain_type: {
FORMAT = format_name
}

format_name: {
TRADITIONAL
| JSON
| TREE
}

explainable_stmt: {
SELECT statement
| TABLE statement
| DELETE statement
| INSERT statement
| REPLACE statement
| UPDATE statement
}

The DESCRIBE and EXPLAIN statements are synonyms. In practice, the
DESCRIBE keyword is more often used to obtain information about table
structure, whereas EXPLAIN is used to obtain a query execution plan
(that is, an explanation of how MySQL would execute a query).

Пример