select tab.owner,tab.table_name,tab.blocks,tab.num_rows,ind.index_name,ind.clustering_factor, round(nvl(ind.clustering_factor,1)/decode(tab.num_rows,0,1,tab.num_rows),3)*100||'%' "集群因子接近行数" from dba_tables tab, dba_indexes ind where tab.table_name=ind.table_name and tab...
select tab.owner,tab.table_name,tab.blocks,tab.num_rows,ind.index_name,ind.clustering_factor, round(nvl(ind.clustering_factor,1)/decode(tab.num_rows,0,1,tab.num_rows),3)*100||'%' "集群因子接近行数" from dba_tables tab, dba_indexes ind where tab.table_name=ind.table_name and tab...
SELECT * FROM your_table FETCH FIRST 10 ROWS ONLY; 使用LIMIT 子句 在Oracle 18c 及更高版本中,可以使用 LIMIT 子句限制查询结果的记录数。以下是一个示例查询,它从表中选择前10条记录: 代码语言:sql 复制 SELECT * FROM your_table LIMIT 10; 请注意,这些查询示例中的 your_table 需要替换为您实际要查询...
chain_cnt :Number of rows in the table that are chained from one data block to another or that have migrated to a new block, requiring a link to preserve the old rowid. This column is updated only after you analyze the table. 数据缓冲区命中率(百分比小于90就要加大db_cache_size) 查询V$S...
select tab.owner,tab.table_name,tab.blocks,tab.num_rows,ind.index_name,ind.clustering_factor, round(nvl(ind.clustering_factor,1)/decode(tab.num_rows,0,1,tab.num_rows),3)*100||'%' "集群因子接近行数" from dba_tables tab, dba_indexes ind where tab.table_name=ind.table_name and tab...
Just check out my SQL Developer resource page, it’s one of the main links on the top of this page. Or if you can’t find something, just drop me a note in the form of a comment on this page and I’ll do my best to find it or write it for you....
Just check out my SQL Developer resource page, it’s one of the main links on the top of this page. Or if you can’t find something, just drop me a note in the form of a comment on this page and I’ll do my best to find it or write it for you....
xxx Beta Draft 1 Oracle Data Miner Oracle Data Miner is an extension to Oracle SQL Developer. Oracle Data Miner is a graphical user interface to Oracle Data Mining, a feature of Oracle Database. Data analysts can use the intuitive Oracle Data Miner graphical user interface (GUI) to discover...
2.1.3 Using Oracle SQL Developer to Connect to Hive Oracle SQL Developer provides methods to connect to a Hive metastore and create Oracle external tables over Hive. Follow these steps to set up Oracle SQL Developer to work with Oracle Big Data SQL. Install Oracle SQL Developer Download the...
FETCH FIRST 10 ROWS ONLY; 代码语言:txt 复制 使用LIMIT关键字: 在Oracle 18c及更高版本中,可以使用LIMIT关键字限制返回的行数。例如,如果要返回前10行,可以使用以下查询: 代码语言:txt 复制 SELECT * FROM your_table LIMIT 10; 代码语言:txt 复制 请注意,以上方法只能在查询中限制返回的行数,而不能在订...