Snowflake supports most basic SQL data types (with some restrictions) for use in columns, local variables, expressions, parameters, and any other appropriate/suitable locations.
In some cases, data of one type can be converted to another type. For example, INTEGER data can be converted to FLOAT.
Some conversions are lossless, but others might lose information. The amount of loss depends upon the data types and the specific value. For example, converting FLOAT to INTEGER removes the digits after the decimal place. (The value is rounded to the nearest integer.)
In some cases, the user must specify the desired conversion, such as when passing a VARCHAR to the TIME_SLICE() function, which expects a TIMESTAMP. We call this “explicit casting”. For more information about explicit casting, see Conversion Functions.
In other cases, data types are converted automatically, such as when adding a float and an integer. We call this “implicit coercion”. In Snowflake, data types are automatically coerced whenever necessary and possible. For more information about implicit coercion, see Data Type Conversion.