sql server增删改查

SQL Server 是一种关系型数据库管理系统 (RDBMS)，以下是 SQL Server 的增删改查语句示例：

1. 插入数据

INSERT INTO table_name (column1, column2, column3, ...)
VALUES (value1, value2, value3, ...);

例如：

INSERT INTO customers (customer_name, city, country)
VALUES ('John Smith', 'New York', 'USA');

2. 更新数据

UPDATE table_name
SET column1 = value1, column2 = value2, ...
WHERE condition;

例如：

UPDATE customers
SET city = 'Los Angeles'
WHERE customer_id = 1;

3. 删除数据

DELETE FROM table_name WHERE condition;

例如：

DELETE FROM customers WHERE customer_id = 1;

4. 查询数据

SELECT column1, column2, ...
FROM table_name
WHERE condition;

例如：

SELECT customer_name, city, country
FROM customers
WHERE customer_id = 1;

以上是 SQL Server 的基本增删改查语句，还可以使用 JOIN、GROUP BY、ORDER BY 等语句对数据进行更复杂的操作。