SQL算术运算符之加法、减法、乘法、除法和取模的用法例子

CREATE PROCEDURE 存储过程名称
AS
SQL语句
GO;

CREATE PROCEDURE SelectAllCustomers
AS
SELECT * FROM Customers
GO;

EXEC SelectAllCustomers;

CREATE PROCEDURE SelectAllCustomers @City nvarchar(30)
AS
SELECT * FROM Customers WHERE City = @City
GO;

EXEC SelectAllCustomers @City = 'London';

CREATE PROCEDURE SelectAllCustomers @City nvarchar(30), @PostalCode nvarchar(10)
AS
SELECT * FROM Customers WHERE City = @City AND PostalCode = @PostalCode
GO;

EXEC SelectAllCustomers @City = 'London', @PostalCode = 'WA1 1DP';

-- 这是单行注释
SELECT * FROM Customers;

SELECT * FROM Customers -- WHERE City='Berlin';

/* 这是
多行注释 */
SELECT * FROM Customers;

/* SELECT * FROM Customers;
SELECT * FROM Products;
SELECT * FROM Orders;
SELECT * FROM Categories; */
SELECT * FROM Suppliers;

SELECT CustomerName, /*City,*/ Country FROM Customers;

SELECT * FROM Customers WHERE (CustomerName LIKE 'L%'
OR CustomerName LIKE 'R%' /*OR CustomerName LIKE 'S%'
OR CustomerName LIKE 'T%'*/ OR CustomerName LIKE 'W%')
AND Country='USA'
ORDER BY CustomerName;

SELECT column1 + column2 AS SumResult FROM tableName;

SELECT column1 - column2 AS Difference FROM tableName;

SELECT column1 * column2 AS Product FROM tableName;

SELECT column1 / column2 AS Quotient FROM tableName;

SELECT column1 % column2 AS Modulus FROM tableName;

SELECT column1 & column2 AS BitwiseAND FROM tableName;

SELECT column1 | column2 AS BitwiseOR FROM tableName;

SELECT column1 ^ column2 AS BitwiseXOR FROM tableName;

SELECT column1 FROM tableName WHERE column1 = column2;

SELECT column1 FROM tableName WHERE column1 > column2;

SELECT column1 FROM tableName WHERE column1 < column2;

SELECT column1 FROM tableName WHERE column1 >= column2;

SELECT column1 FROM tableName WHERE column1 <= column2;

SELECT column1 FROM tableName WHERE column1 <> column2;

UPDATE tableName SET column1 += 10 WHERE condition;

UPDATE tableName SET column1 -= 5 WHERE condition;

UPDATE tableName SET column1 *= 2 WHERE condition;

UPDATE tableName SET column1 /= 3 WHERE condition;

UPDATE tableName SET column1 %= 4 WHERE condition;

SELECT * FROM tableName WHERE condition1 AND condition2;

SELECT * FROM tableName WHERE condition1 OR condition2;

SELECT * FROM tableName WHERE NOT condition;