oracle字符型转换为数值型 oracle里面怎么字符串转成number？
oracle里面怎么字符串转成number？WITH t AS (SELECT "abcdefghijklmn" AS a FROM dual UNION ALL SELECT "a
oracle里面怎么字符串转成number？
WITH t AS (SELECT "abcdefghijklmn" AS a FROM dual UNION ALL SELECT "abcdefgh" AS a FROM dual UNION ALL SELECT "abcd" AS a FROM dual) SELECT CASE WHEN length(lpad(t.a， 8， "0")) = 8 THEN lpad(t.a， 8， "0") ELSE substr(t.a， 1， 8) END AS a FROM t