Oracle教程 2023-02-25

Oracle 视图 DBA_PDB_SNAPSHOTS 官方解释，作用，如何使用详细说明

Oracle视图DBA_PDB_SNAPSHOTS对应于数据库范围的子体/容器数据库的快照状态，该视图显示从可用的PDB到完全受限的PDB所有状态。

DBA_PDB_SNAPSHOTS用于显示容器数据库的快照状态。它显示了在特定容器数据库上执行快照操作后每个PDB的当前状态，包括PDB的创建日期和时间，打开状态和操作。

这是用于管理容器数据库及其子体/PDB的有用信息。它还有助于监视用于打开或关闭容器数据库/PDB的操作的进度。

可以使用如下查询来检查容器数据库/PDB的信息：

SELECT PDB_NAME, PDB_MODE, RESTRICTED, SNAP_TIMESTAMP FROM DBA_PDB_SNAPSHOTS where container_name=”

DBA_PDB_SNAPSHOTS describes the snapshots taken of pluggable databases (PDBs).

Rows are added to this view when a snapshot of a PDB is taken by using the ALTER PLUGGABLE DATABASE SNAPSHOT SQL statement.

Column	Datatype	NULL	Description
`CON_ID`	`NUMBER`	`NOT NULL`	The ID of the PDB
`CON_UID`	`NUMBER`	`NOT NULL`	Unique ID assigned to the PDB at creation time
`CON_NAME`	`VARCHAR2(128)`	`NOT NULL`	Name of the PDB
`SNAPSHOT_NAME`	`VARCHAR2(128)`	`NOT NULL`	Snapshot name of the PDB
`SNAPSHOT_SCN`	`NUMBER`	`NOT NULL`	SCN at which the snapshot was taken
`PREVIOUS_SNAPSHOT_SCN`	`NUMBER`	`NOT NULL`	SCN at which the previous snapshot for the PDB was taken
`SNAPSHOT_TIME`	`NUMBER`	`NOT NULL`	Timestamp at which the snapshot was taken
`PREVIOUS_SNAPSHOT_TIME`	`NUMBER`	`NOT NULL`	Timestamp of the previous snapshot for this PDB
`FULL_SNAPSHOT_PATH`	`VARCHAR2(4000)`	`NOT NULL`	Full path for the snapshot

Note:

This view does not display snapshot copy PDBs, which are created by using the CREATE PLUGGABLE DATABASE … SNAPSHOT COPY SQL statement.