Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_name_88 ( Id VARCHAR )

### Question ###
What is 1994 Grand Slam Tournament if 1993 is also grand slam tournaments?

### Accurate SQL ###

SELECT 1994 FROM table_name_88 WHERE 1993 = "grand slam tournaments"