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_30723 ( "Team" text, "Head Coach" text, "Years at School" real, "Overall Record" text, "Record at School" text, "ACC Record" text )

### Question ###
What is the Record at School of Tom O'Brien's team?

### Accurate SQL ###

SELECT "Record at School" FROM table_30723 WHERE "Head Coach" = 'Tom O''Brien'