1、查看表占的空间
SELECT t.segment_name, round(SUM(t.bytes/1024/1024/1024),2) FROM user_segments t GROUP BY t.segment_name ORDER BY SUM(t.bytes/1024/1024/1024) DESC
2、查看表空间使用率(包含临时表空间)
SELECT * FROM ( SELECT A.TABLESPACE_NAME,ROUND(A.BYTES / (1024 * 1024 * 1024), 2) AS "表空间大小(GB)" ,ROUND(B.BYTES / (1024 * 1024 * 1024), 2) AS "表空间剩余大小(GB)" ,ROUND((A.BYTES - B.BYTES) / (1024 * 1024 * 1024), 2) AS "表空间使用大小(GB)" ,TO_CHAR((1 - B.BYTES / A.BYTES) * 100, '99.99999') || '%' AS "使用率" FROM (SELECT TABLESPACE_NAME, SUM(BYTES) BYTES FROM DBA_DATA_FILES GROUP BY TABLESPACE_NAME) A, (SELECT TABLESPACE_NAME, SUM(BYTES) BYTES FROM DBA_FREE_SPACE GROUP BY TABLESPACE_NAME) B WHERE A.TABLESPACE_NAME = B.TABLESPACE_NAME UNION ALL SELECT C.TABLESPACE_NAME,ROUND(C.BYTES / (1024 * 1024 * 1024), 2) "表空间大小(GB)" ,ROUND((C.BYTES - D.BYTES_USED) / (1024 * 1024 * 1024), 2) "表空间剩余大小(GB)" ,ROUND(D.BYTES_USED / (1024 * 1024 * 1024), 2) "表空间使用大小(GB)" ,TO_CHAR(D.BYTES_USED * 100 / C.BYTES, '99.99999') || '%' "使用率" FROM(SELECT TABLESPACE_NAME, SUM(BYTES) BYTES FROM DBA_TEMP_FILES GROUP BY TABLESPACE_NAME) C, (SELECT TABLESPACE_NAME, SUM(BYTES_CACHED) BYTES_USED FROM V$TEMP_EXTENT_POOL GROUP BY TABLESPACE_NAME) D WHERE C.TABLESPACE_NAME = D.TABLESPACE_NAME ) ORDER BY 5 desc ;
3、查看表空间或者用户的表占用的空间
查看具体的表空间 SELECT TABLESPACE_NAME,OWNER,SEGMENT_NAME,/*PARTITION_NAME,*/SEGMENT_TYPE,ROUND(SUM(BYTES)/1024/1024/1024,2) SIZE_GB FROM DBA_SEGMENTS WHERE TABLESPACE_NAME = UPPER('PCGSPDATA') GROUP BY TABLESPACE_NAME, OWNER, SEGMENT_NAME,/*PARTITION_NAME,*/ SEGMENT_TYPE HAVING ROUND(SUM(BYTES)/1024/1024/1024,2) >= 0.1 ORDER BY SIZE_GB DESC ;
标签:1024,NAME,SUM,BYTES,中表,查询,TABLESPACE,Oracle,SELECT From: https://www.cnblogs.com/Faith-zhang/p/18103414