数据库各种操作使用的SQL语句是什么?
时间: 2023-06-24 08:05:01 浏览: 42
SQL是结构化查询语言(Structured Query Language)的缩写,是一种用于管理关系型数据库的标准语言。以下是常见的SQL语句操作:
1. 创建数据库和表格:
```
CREATE DATABASE database_name;
USE database_name;
CREATE TABLE table_name (
column1 datatype,
column2 datatype,
column3 datatype,
.....
);
```
2. 插入数据:
```
INSERT INTO table_name (column1, column2, column3, ...)
VALUES (value1, value2, value3, ...);
```
3. 更新数据:
```
UPDATE table_name
SET column1 = value1, column2 = value2, ...
WHERE some_column = some_value;
```
4. 删除数据:
```
DELETE FROM table_name
WHERE some_column = some_value;
```
5. 查询数据:
```
SELECT column1, column2, ...
FROM table_name
WHERE some_column = some_value;
```
6. 排序:
```
SELECT column1, column2, ...
FROM table_name
ORDER BY column1 ASC/DESC;
```
7. 连接两个或多个表格:
```
SELECT column_name(s)
FROM table1
JOIN table2
ON table1.column_name = table2.column_name;
```
这只是SQL语言的一部分,SQL还有很多其他的操作和语法。