问在MSSQL中等效的REGEXP_SUBSTREN欧姆定律：在同一电路中，通过某一导体的电流跟这段导体两端的电压成...
'NLS_SORT=SCHINESE_RADICAL_M'); --按照拼音排序: select * from table order by nlssort(col,'NLS_SORT=SCHINESE_PINYIN_M'); --解决: 1班 2班 3班 select * from table order by to_number(regexp_substr(a.bjname,'[0-9]*[0-9]',1)); 4班...
Oracle函数REGEXP_SUBSTR结合CONNECT BY result from dual; --80 select regexp_substr('60,70,80,90,100','[^,]+',4,3) result from dual; --90 CONNECT...BY LEVEL Oracle中使用connect by 来实现树状查询,可以使用level这个伪列来实现分层查询 SELECT LEVEL FROM DUAL CONNECT BY LEVEL <=...3; ...