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格式调整

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罗祥 2019-04-29 17:44:53 +08:00
commit 5d8ebaf152
1 changed files with 4 additions and 7 deletions
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notes/Hive常用DML操作.md
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@ -75,11 +75,11 @@ LOAD DATA INPATH "hdfs://hadoop001:8020/mydir/emp.txt" OVERWRITE INTO TABLE emp
### 2.1 语法 ### 2.1 语法
```sql ```sql
INSERT OVERWRITE TABLE tablename1 [PARTITION (partcol1=val1, partcol2=val2 ...) INSERT OVERWRITE TABLE tablename1 [PARTITION (partcol1=val1, partcol2=val2 ...) [IF NOT EXISTS]]
[IF NOT EXISTS]] select_statement1 FROM from_statement; select_statement1 FROM from_statement;
INSERT INTO TABLE tablename1 [PARTITION (partcol1=val1, partcol2=val2 ...)] INSERT INTO TABLE tablename1 [PARTITION (partcol1=val1, partcol2=val2 ...)]
select_statement1 FROM from_statement; select_statement1 FROM from_statement;
``` ```
+ Hive 0.13.0开始，建表时可以通过使用TBLPROPERTIES（“immutable”=“true”）来创建不可变表(immutable table) ，如果不可以变表中存在数据，则INSERT INTO失败。（注：INSERT OVERWRITE的语句不受`immutable`属性的影响）; + Hive 0.13.0开始，建表时可以通过使用TBLPROPERTIES（“immutable”=“true”）来创建不可变表(immutable table) ，如果不可以变表中存在数据，则INSERT INTO失败。（注：INSERT OVERWRITE的语句不受`immutable`属性的影响）;
@ -281,9 +281,6 @@ DELETE FROM emp_ts WHERE empno=2;
<div align="center"> <img src="https://github.com/heibaiying/BigData-Notes/blob/master/pictures/hive-emp-ts-2.png"/> </div> <div align="center"> <img src="https://github.com/heibaiying/BigData-Notes/blob/master/pictures/hive-emp-ts-2.png"/> </div>
## 五、查询结果写出到文件系统 ## 五、查询结果写出到文件系统
### 5.1 语法 ### 5.1 语法
@ -332,4 +329,4 @@ SELECT * FROM emp_ptn;
## 参考资料 ## 参考资料
1. [Hive Transactions](https://cwiki.apache.org/confluence/display/Hive/Hive+Transactions) 1. [Hive Transactions](https://cwiki.apache.org/confluence/display/Hive/Hive+Transactions)
2. [Hive Data Manipulation Language](https://cwiki.apache.org/confluence/display/Hive/LanguageManual+DML) 2. [Hive Data Manipulation Language](https://cwiki.apache.org/confluence/display/Hive/LanguageManual+DML)