如果我改变一个表来添加一个分区，我会丢失Oracle SQL中的数据吗？

Question

I am not sure about altering a table to create a new partition as I am afraid I will lose data. If a table in an Oracle SQL DB is already partitioned but I am adding a new partition, will the existing data in the table be deleted?

Answer 1

No you dont lose the data

You can create list partition and expand it on default partition

for example if your partion is date:

alter table your_table split partition PDEFAULT values(TO_DATE('20161206','yyyymmdd')) into ( partition P20161206,partition PDEFAULT)

Answer 2

The only ALTER TABLE partitioning commands that can destroy data are DROP and TRUNCATE.

The EXCHANGE partition command can move data from a table partition to a different table, and vice-versa.

ADD, MOVE, COALESCE, RENAME, SPLIT, and MERGE do not change the table's data, although COALESCE, SPLIT, and MERGE can change the partition or subpartition in which data is stored.