introduce
CTAS refers to using create table as select to create a new partition table based on the original table structure.
- Advantages: The operation is simple and controllable. CTAS uses DDL, which does not generate UNDO and only generates a small amount of REDO. The efficiency is relatively high, and after the table creation is completed, the data is already distributed to various partitions;
- Disadvantages: The table cannot be accessed during CTAS and RENAME, and the operation needs to be stopped. The table structure and table data need to be sorted out. After conversion, a large number of comparisons are required, and the preparation work is relatively complicated;
This article mainly explains how to use CTAS to convert partition tables.
Environmental preparation
| CPU name | IP address | Database version | user | table space | Table Name | partition column | Partition duration |
|---|---|---|---|---|---|---|---|
| lucifer | 10.211.55.200 | 19C | about | par_tbs | lucifer | by_date | 2 years |
Test environment use OracleShellInstall one-click installation script Installation:
## 主
./OracleShellInstall -lf enp0s5