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Hàm ASCII trong SQL Server - Freetuts
STRING FUNCTIONS
NUMERIC/MATH FUNCTIONS
DATE/TIME FUNCTIONS
CONVERSION FUNCTIONS
CONFIGURATION FUNCTIONS
ADVANCED FUNCTIONS
CÁC CHỦ ĐỀ
BÀI MỚI NHẤT
Hàm ASCII trong SQL Server
Trong bài này mình sẽ hướng dẫn cách sử dụng hàm ASCII
trong SQL Server
thông qua cú pháp và ví dụ thực tế.
Bài viết này được đăng tại freetuts.net , không được copy dưới mọi hình thức.
1. Mô tả
Hàm ASCII
trả về mã số đại diện cho ký tự được chỉ định.
2. Cú pháp
Cú pháp của hàm ASCII
trong SQL Server
(Transact-SQL) là:
ASCII( single_character )
Trong đó:
Bài viết này được đăng tại [free tuts .net]
single_character
: Ký tự được chỉ định để truy xuất mã số ASCII
. Nếu nhập nhiều ký tự, hàm ASCII
sẽ trả về giá trị cho ký tự đầu tiên và bỏ qua tất cả các ký tự sau ký tự đầu tiên.
3. Version
Hàm ASCII
có thể được sử dụng trong các phiên bản sau của SQL Server
(Transact-SQL):
SQL Server 2017, SQL Server 2016, SQL Server 2014, SQL Server 2012, SQL Server 2008 R2, SQL Server 2008, SQL Server 2005
4. Ví dụ
SELECT ASCII('f');
Ket qua: 102
SELECT ASCII('freetuts.net');
Ket qua: 102
SELECT ASCII('M');
Ket qua: 77
SELECT ASCII('Myfreetuts.net');
Ket qua: 77
Cùng chuyên mục: