SQL Server determines whether it is null

SQL Server

Replace Null:isnull (Arg,value)

For example: Select IsNull (price,0.0) from orders, if Price is null, replace with 0.0

Compared to null: is not null,is null

such as SELECT * from orders where price is null and price equals NULL

For example: SELECT * FROM Orders where the price was not null and price does not equal null

Oracle

Replace NULL:NVL (Arg,value)

Example: Select NVL (price,0.0) Form orders

Compared to null: is not null,is null

such as SELECT * from orders where price is null and price equals NULL

For example: SELECT * FROM Orders where the price was not null and price does not equal null

SQL Server determines whether it is null