Update sql-statement-explain-analyze.md (pingcap#3824)

Author: Joyinqin

sql-statements/sql-statement-explain-analyze.md

@@ -93,7 +93,7 @@ EXPLAIN ANALYZE SELECT * FROM t1;
 
 ## MySQL compatibility
 
-`EXPLAIN ANALYZE` is a feature of MySQL 8.0, but both the output format and the potential execution plans in TiDB differ substaintially from MySQL.
+`EXPLAIN ANALYZE` is a feature of MySQL 8.0, but both the output format and the potential execution plans in TiDB differ substantially from MySQL.
 
 ## See also