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如何查看Oracle用户的SQL执行历史记录？ - 数据库(内核) - 清泛网 - 专注C/...
....arc',options=>dbms_logmnr.new);
--开始miner
SQL> execute dbms_logmnr.start_logmnr(options=>dbms_logmnr.dict_from_online_catalog);
--查看结果
SQL> col username format a8;
SQL> col sql_redo format a50
SQL> select username,scn,timestamp,sql_redo from v$logmnr_contents where table_name='T...
Do sessions really violate RESTfulness?
...ed server cannot take over fulfilling requests based on that key, you have started to really violate the principles of REST. Google's services ensure that, at any time, you can take an authentication token you were using on your phone against load balance server A and hit load balance server B from...
Delete the first three rows of a dataframe in pandas
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No, It doesn't. The start position of the slice is always included.
– bdiamante
Jan 20 '17 at 19:30
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Javascript regex returning true.. then false.. then true.. etc [duplicate]
... get the next match, and so on until you get no match and it resets to the start of the next string. You can also write regex.lastIndex= 0 to reset this state.
(This is of course an absolutely terrible piece of design, guaranteed to confuse and cause weird errors. Welcome to JavaScript!)
You can o...
What does “dereferencing” a pointer mean?
...f( "%d\n", *pA ) ; // prints 4..
If the book isn't there, the librarian starts shouting, shuts the library down, and a couple of people are set to investigate the cause of a person going to find a book that isn't there.
s...
Converting Integer to String with comma for thousands
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Have a look in String.format. It starts with return new Formatter(l) ... etc. So the garbage collector argument is not as strong at it seems.
– Scheintod
Sep 25 '17 at 19:59
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How can I make my own base image for Docker?
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To start building your own image from scratch, you can use the scratch image.
Using the scratch “image” signals to the build process that you want the next command in the Dockerfile to be the first filesystem layer in yo...
How to sort a collection by date in MongoDB?
... doc) {});
this worked for me
referred https://docs.mongodb.org/getting-started/node/query/
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List to array conversion to use ravel() function
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both command will create a new array starting from a list, that's for sure, but often the point is to convert an input to a specific format to apply certain method, and this looks more like the case of the OP. using asarray is a good habit unless one is certain ...
Grouping functions (tapply, by, aggregate) and the *apply family
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When I started learning R from scratch I found plyr MUCH easier to learn than the *apply() family of functions. For me, ddply() was very intuitive as I was familiar with SQL aggregation functions. ddply() became my hammer for solvin...