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oracle中闪回操作分析介绍
sql> select * from student; select * from student * error at line 1: ora-00942: table or view does not exist sql> select * from bin$wa/yb4j1lbhguab/aqawvq==$0; select * from bin$wa/yb4j1lbhguab/aqawvq==$0 * error at line 1: ora-00933: sql command not properly ended sql> select * from "bin$wa/yb4j1lbhguab/aqawvq==$0"; id name age ---------- ---------- ---------- 1 tom 23 2 mary 24 sql> show recyclebin; original name recyclebin name object type drop time ---------------- ------------------------------ ------------ ------------------- student bin$wa/yb4j1lbhguab/aqawvq==$0 table 2017-09-01:01:26:38 sql> flashback table student to before drop; flashback complete. sql> show recyclebin; sql> select * from student; id name age ---------- ---------- ---------- 1 tom 23 2 mary 24
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Oracle字符串函数length、upper、lower、initcap、 concat、instr、replace
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