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_20236726_2 (wd_no VARCHAR, lms_no VARCHAR)

### Question ###
Name the total number of wd number for lms number being 7638

### Accurate SQL ###

SELECT COUNT(wd_no) FROM table_20236726_2 WHERE lms_no = 7638