sqlsever基本语句
时间: 2024-10-24 11:14:20 浏览: 27
SQL Server是一种关系型数据库管理系统,其基础语句主要包括以下几个部分:
1. **SELECT**:用于从数据表中选择特定的数据行或列。例如:
```sql
SELECT column1, column2 FROM table_name;
```
2. **INSERT**:插入新记录到表中:
```sql
INSERT INTO table_name (column1, column2) VALUES (value1, value2);
```
3. **UPDATE**:修改表中已存在的记录:
```sql
UPDATE table_name SET column1 = new_value WHERE condition;
```
4. **DELETE**:删除满足条件的记录:
```sql
DELETE FROM table_name WHERE condition;
```
5. **CREATE**:创建表、视图、存储过程等:
```sql
CREATE TABLE table_name (column1 data_type);
CREATE VIEW view_name AS SELECT * FROM table_name;
```
6. **ALTER**:更改表结构,如添加、删除字段或索引:
```sql
ALTER TABLE table_name ADD column_name data_type;
```
7. **DROP**:删除表、视图或其他数据库对象:
```sql
DROP TABLE table_name;
DROP VIEW view_name;
```
8. **JOIN**: 连接两个或更多表以获取相关数据:
```sql
SELECT * FROM table1 JOIN table2 ON table1.common_column = table2.common_column;
```
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