sql server常见语法
时间: 2023-07-01 10:24:14 浏览: 58
以下是 SQL Server 常见的 SQL 语法:
1. 创建表:
```sql
CREATE TABLE table_name (
column1 datatype constraint,
column2 datatype constraint,
column3 datatype constraint,
...
);
```
2. 插入数据:
```sql
INSERT INTO table_name (column1, column2, column3, ...)
VALUES (value1, value2, value3, ...);
```
3. 更新数据:
```sql
UPDATE table_name SET column_name = new_value WHERE condition;
```
4. 删除数据:
```sql
DELETE FROM table_name WHERE condition;
```
5. 查询数据:
```sql
SELECT column1, column2, ...
FROM table_name
WHERE condition
ORDER BY column1 ASC/DESC;
```
6. 连接表:
```sql
SELECT column_name(s)
FROM table1
JOIN table2
ON table1.column_name = table2.column_name;
```
7. 分组数据:
```sql
SELECT column_name, COUNT(*)
FROM table_name
GROUP BY column_name;
```
8. 聚合函数:
```sql
SELECT COUNT(column_name)
FROM table_name;
```
9. 子查询:
```sql
SELECT column_name
FROM table_name
WHERE column_name IN (SELECT column_name FROM table_name WHERE condition);
```
以上是 SQL Server 常用的 SQL 语法,可以帮助您完成数据的增删改查、连接和聚合等操作。
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