Here is the syntax for the convert() function.
CONVERT(data_type(length), expression, style)
The datatype to convert expression to. Can be one of the following: bigint, int, smallint, tinyint, bit, decimal, numeric, money, smallmoney, float, real, datetime, smalldatetime, char, varchar, text, nchar, nvarchar, ntext, binary, varbinary, or image. Required filed.
The length of the resulting data type (for char, varchar, nchar, nvarchar, binary and varbinary).Its and Optional.
The Expression value to convert to another data type. Required filed.
The Style format used to convert between data types, such as a date or string format.Its an Optional.
refer the below query to your answer,
select CONVERT(date,BDATE) from PersonData
Refer the below link to various type of Convert Formation.
https://learn.microsoft.com/en-us/sql/t-sql/functions/cast-and-convert-transact-sql