Sqlserver string type converted to decimal or integer type

stay SQL Server in , There are three ways to convert a string value to a numeric value .

1. Use cast() Method .

select cast('6.0' as decimal(6, 2)); -- 6.00

2. Use convert() Method .

select convert(decimal(6, 2), '100'); -- 100.00

3. Use and value 0 The method of addition .

select '233' + 0; -- 233

The above three methods should pay special attention to the value of the converted type when converting the type , Because there may be various problems of forced conversion failure , For example, the number of decimal places / Error reporting caused by format mismatch .