04 2019 档案
摘要:Oracle 11g 版本支持 使用 wm_concat 函数select entity,wm_concat(RIGHT_TYPE) types from common_dataright_filed group by entity Oracle 12 不支持wm_concat 函数,使用 listagg(RIGHT_TYPE,',') within group (order by ent...
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摘要:1.EXPLAIN plan FOR select * ....语句 2.select * from table(dbms_xplan.display); 呈现结果: | Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time | | 0 |
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