Display all grants for user in MySQL

Use INFORMATION_SCHEMA.SCHEMA_PRIVILEGES to display all grants for a user −
select *from INFORMATION_SCHEMA.SCHEMA_PRIVILEGES;
Let us implement the above syntax to show all grants for a user −
mysql> select *from INFORMATION_SCHEMA.SCHEMA_PRIVILEGES;
This will produce the following output −
+-----------------------------+---------------+--------------------+-------------------------+--------------+
| GRANTEE                     | TABLE_CATALOG | TABLE_SCHEMA       | PRIVILEGE_TYPE          | IS_GRANTABLE |
+-----------------------------+---------------+--------------------+-------------------------+--------------+
| 'mysql.sys'@'localhost'     | def           | sys                | TRIGGER                 | NO           |
| 'Adam Smith'@'localhost'    | def           | test               | SELECT                  | NO           |
| 'Adam Smith'@'localhost'    | def           | test               | INSERT                  | NO           |
| 'Adam Smith'@'localhost'    | def           | test               | UPDATE                  | NO           |
| 'Adam Smith'@'localhost'    | def           | test               | DELETE                  | NO           |
| 'Adam Smith'@'localhost'    | def           | test               | CREATE                  | NO           |
| 'Adam Smith'@'localhost'    | def           | test               | DROP                    | NO           |
| 'Adam Smith'@'localhost'    | def           | test               | REFERENCES              | NO           |
| 'Adam Smith'@'localhost'    | def           | test               | INDEX                   | NO           |
| 'Adam Smith'@'localhost'    | def           | test               | ALTER                   | NO           |
| 'Adam Smith'@'localhost'    | def           | test               | CREATE TEMPORARY TABLES | NO           |
| 'Adam Smith'@'localhost'    | def           | test               | LOCK TABLES             | NO           |
| 'Adam Smith'@'localhost'    | def           | test               | EXECUTE                 | NO           |
| 'Adam Smith'@'localhost'    | def           | test               | CREATE VIEW             | NO           |
| 'Adam Smith'@'localhost'    | def           | test               | SHOW VIEW               | NO           |
| 'Adam Smith'@'localhost'    | def           | test               | CREATE ROUTINE          | NO           |
| 'Adam Smith'@'localhost'    | def           | test               | ALTER ROUTINE           | NO           |
| 'Adam Smith'@'localhost'    | def           | test               | EVENT                   | NO           |
| 'Adam Smith'@'localhost'    | def           | test               | TRIGGER                 | NO           |
| 'David'@'localhost'         | def           | test               | SELECT                  | NO           |
| 'David'@'localhost'         | def           | test               | INSERT                  | NO           |
| 'David'@'localhost'         | def           | test               | UPDATE                  | NO           |
| 'David'@'localhost'         | def           | test               | DELETE                  | NO           |
| 'David'@'localhost'         | def           | test               | CREATE                  | NO           |
| 'David'@'localhost'         | def           | test               | REFERENCES              | NO           |
| 'David'@'localhost'         | def           | test               | ALTER                   | NO           |
| 'mysql.session'@'localhost' | def           | performance_schema | SELECT                  | NO           |
| 'Robert'@'%'                | def           | sample             | SELECT                  | YES          |
| 'Robert'@'%'                | def           | sample             | INSERT                  | YES          |
| 'Robert'@'%'                | def           | sample             | UPDATE                  | YES          |
| 'Robert'@'%'                | def           | sample             | DELETE                  | YES          |
| 'Robert'@'%'                | def           | sample             | CREATE                  | YES          |
| 'Robert'@'%'                | def           | sample             | DROP                    | YES          |
| 'Robert'@'%'                | def           | sample             | REFERENCES              | YES          |
| 'Robert'@'%'                | def           | sample             | INDEX                   | YES          |
| 'Robert'@'%'                | def           | sample             | ALTER                   | YES          |
| 'Robert'@'%'                | def           | sample             | CREATE TEMPORARY TABLES | YES          |
| 'Robert'@'%'                | def           | sample             | LOCK TABLES             | YES          |
| 'Robert'@'%'                | def           | sample             | EXECUTE                 | YES          |
| 'Robert'@'%'                | def           | sample             | CREATE VIEW             | YES          |
| 'Robert'@'%'                | def           | sample             | SHOW VIEW               | YES          |
| 'Robert'@'%'                | def           | sample             | CREATE ROUTINE          | YES          |
| 'Robert'@'%'                | def           | sample             | ALTER ROUTINE           | YES          |
| 'Robert'@'%'                | def           | sample             | EVENT                   | YES          |
| 'Robert'@'%'                | def           | sample             | TRIGGER                 | YES          |
| 'Robert'@'%'                | def           | web                | EXECUTE                 | NO           |
+-----------------------------+---------------+--------------------+-------------------------+--------------+
46 rows in set (0.00 sec)