hive sql基本语法
时间: 2023-09-13 10:05:45 浏览: 118
Hive SQL是一种基于Apache Hive的SQL方言,用于在Hadoop上进行数据查询和分析。以下是Hive SQL的基本语法:
1. 创建表:
```
CREATE TABLE table_name (
column1 datatype,
column2 datatype,
...
);
```
2. 插入数据:
```
INSERT INTO table_name (column1, column2, ...)
VALUES (value1, value2, ...);
```
3. 查询数据:
```
SELECT column1, column2, ...
FROM table_name
WHERE condition;
```
4. 更新数据:
```
UPDATE table_name
SET column1 = value1, column2 = value2, ...
WHERE condition;
```
5. 删除数据:
```
DELETE FROM table_name
WHERE condition;
```
6. 聚合函数:
```
SELECT COUNT(column), SUM(column), AVG(column), MAX(column), MIN(column)
FROM table_name
GROUP BY column;
```
7. 排序:
```
SELECT column1, column2, ...
FROM table_name
ORDER BY column1 ASC, column2 DESC;
```
8. 连接表:
```
SELECT column1, column2, ...
FROM table1
JOIN table2 ON table1.column = table2.column;
```
这只是Hive SQL的基本语法示例,还有更多高级用法和功能可以进一步学习和探索。
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