sqlserver 的select语法
时间: 2024-01-11 09:08:21 浏览: 29
SELECT [DISTINCT] column1, column2, ... FROM table1 [JOIN table2 ON condition] [WHERE condition] [GROUP BY column(s)] [HAVING condition] [ORDER BY column(s) ASC/DESC];
相关问题
sql server基本语法
SQL Server 是一种关系型数据库管理系统,它使用 SQL(Structured Query Language)进行数据管理和查询。下面是一些 SQL Server 的基本语法:
1. 创建数据库:
```sql
CREATE DATABASE database_name;
```
2. 创建表格:
```sql
CREATE TABLE table_name (
column1 datatype constraint,
column2 datatype constraint,
...
);
```
3. 插入数据:
```sql
INSERT INTO table_name (column1, column2, ...)
VALUES (value1, value2, ...);
```
4. 更新数据:
```sql
UPDATE table_name
SET column1 = value1, column2 = value2, ...
WHERE condition;
```
5. 删除数据:
```sql
DELETE FROM table_name
WHERE condition;
```
6. 查询数据:
```sql
SELECT column1, column2, ...
FROM table_name
WHERE condition;
```
7. 排序数据:
```sql
SELECT column1, column2, ...
FROM table_name
ORDER BY column_name [ASC|DESC];
```
以上是 SQL Server 的一些基本语法,还有很多其他功能和语法可以学习和应用。如果你有具体的问题或者需要更深入的了解,请告诉我。
sql server常见语法
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。