大数据--sqoop数据增量导入

Posted 2022-12-29 jeff190812

1、在mysql中新建表stu，插入一些数据

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 2、将MySQL表的stu中的数据导入到hive中

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[root@bigdata113 ~]# sqoop import --connect jdbc:mysql://bigdata113:3306/mysqlhdfs --username root --password 000000 --table stu --delete-target-dir --num-mappers 1 --hive-import --fields-terminated-by "\\t" --hive-overwrite --hive-table stu_hive

hive (default)> select * from stu_hive;
OK
stu_hive.id stu_hive.name
1 zhangsan
2 isi
3 wangwu
4 yiliu
5 lisa
Time taken: 0.491 seconds, Fetched: 5 row(s)

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3、往MySQL表stu中添加新数据

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4、将MySQL表stu新增的数据追加到hive的stu_hive中

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[root@bigdata113 ~]# sqoop import --connect jdbc:mysql://bigdata113:3306/mysqlhdfs --username root --password 000000 --table stu --num-mappers 1 --fields-terminated-by "\\t" --target-dir /user/hive/warehouse/stu_hive --check-column id --incremental append --last-value 5

hive (default)> select * from stu_hive;
OK
stu_hive.id stu_hive.name
1 zhangsan
2 isi
3 wangwu
4 yiliu
5 lisa
6 xiaohei
Time taken: 0.091 seconds, Fetched: 6 row(s)