Oracle SQLcl (SQL Developer Command Line)是Oracle数据库基于java的命令行接口。使用SQLcl,您可以交互地执行SQL和PL/SQL语句,也可以将其作为批处理文件执行。SQLcl提供内联编辑、语句完成、命令收回,还支持现有的SQL* Plus脚本。 可以通过https://www.oracle.com/database/sqldeveloper/technologies/sqlcl/download/...
resumable_timeout--waittime(inseconds)forRESUMABLE(Default7200)date_cache--size(inentries)ofdate conversioncache(Default1000)no_index_errors--abort load on any indexerrors(DefaultFALSE)partition_memory--direct path partition memory limit to startspilling(kb)(Default0)table--Tableforexpress mode load...
代码语言:sql 复制 SELECT*FROMyour_tableFETCHFIRST10ROWSONLY; 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*FROMyour_tableLIMIT10;
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.owner not in ('SYS','SYSTEM','WMSYS','DBSNMP','CTXSYS','XDB','ORDDATA','SYSMAN
Oracle developer以其快速的数据处理开发而闻名,其异常处理机制也是比较完善,不可小觑。 1、 异常的优点 如果没有异常,在程序中,应当检查每个命令的成功还是失败,如 BEGIN SELECT ... -- check for ’no data found’ error SELECT ... -- check for ’no data found’ error ...
SET HISTORY LIMIT N allows you to change the default limit, where N is the maximum number. History is retained between SQLcl sessions. By default, the SHOW, HISTORY, CONNECT, and SET commands are not saved in history. SET HISTORY BLACKLIST allows you to set the commands that should not ...
SET HISTORY LIMIT N allows you to change the default limit, where N is the maximum number. History is retained between SQLcl sessions. By default, the SHOW, HISTORY, CONNECT, and SET commands are not saved in history. SET HISTORY BLACKLIST allows you to set the commands that should not ...
col num_rowsfor99999col partition_namefora20 col LAST_ANALYZEDfora30 col blocksfor99999col empty_blocksfor99999selectowner,table_name,num_rows,partition_name,LAST_ANALYZED,blocks,empty_blocksfromdba_tab_statisticswhereowner=''andtable_name='';-- -- -- -- -- -- -- -- -- -- 索引统计系...
Version19.3.0.0.0SQL> 如果使用操作系统认证,需要设置OS_AUTHENT_PREFIX初始化参数,来指定操作系统认证用户名的前缀,这个前缀的默认值是OPS$, 当操作系统用户leo登录时,Oracle会检查是否有一个OPS$LEO的用户存在,如果存在,则允许用户登录。 SQL>showparameteros_authent_prefix; ...
将下面的SQL保存为 rowid_chunk.sql文件 主要功能:将表按照rowid范围分区,获得指定数目的rowid Extent区间(Group sets of rows in the table into smaller chunks), 以便于非分区表利用rowid来实现并行删除或更新 REM rowid_ranges should be at least 21REM utilize this script help delete large tableREM if up...