Domain Types in SQL char(n).Fixed length character string,with user-specified length n. varchar(n).Variable length character strings,with user-specified maximum length n. int.Integer (a finite subset of the integers that is machine-dependent). ■ smallint.Small integer (a machine-dependent subset of the integer domain type). numeric(p,d).Fixed point number,with user-specified precision of p digits,with d digits to the right of decimal point.(ex.,numeric(3,1),allows 44.5 to be stores exactly,but not 444.5 or 0.32) real,double precision.Floating point and double-precision floating point numbers,with machine-dependent precision. ■ float(n).Floating point number,with user-specified precision of at least n digits. More are covered in Chapter 4 Database System Concepts-7th Edition 3.6 ©Silberscha乜，Korth and SudarshanDatabase System Concepts - 7 3.6 ©Silberschatz, Korth and Sudarshan th Edition Domain Types in SQL ▪ char(n). Fixed length character string, with user-specified length n. ▪ varchar(n). Variable length character strings, with user-specified maximum length n. ▪ int. Integer (a finite subset of the integers that is machine-dependent). ▪ smallint. Small integer (a machine-dependent subset of the integer domain type). ▪ numeric(p,d). Fixed point number, with user-specified precision of p digits, with d digits to the right of decimal point. (ex., numeric(3,1), allows 44.5 to be stores exactly, but not 444.5 or 0.32) ▪ real, double precision. Floating point and double-precision floating point numbers, with machine-dependent precision. ▪ float(n). Floating point number, with user-specified precision of at least n digits. ▪ More are covered in Chapter 4