Implicit conversion in SQL Server

SQL Server Data Type Conversion Methods and performance comparison

SQL CAST Function for Data Type Conversions

Handling error converting data type varchar to numeric in SQL Server

Error converting data type varchar to float

Comparing VARCHAR(max) vs VARCHAR(n) data types in SQL Server

if i had a varchar400 column but it has nothing but numbers in it what function do i use to change it to int 91617

Common SQL syntax errors and how to resolve them

Numeric Types and Casting