Each log group contains at least one log member. To be safe, it is recommended that each log group contain more than two members, and each log member is located at a different location.diskWhen writing logs, Oracle will write the same content into multiple members of the same log group.
There are at least 2 log groups, with the same size in each group and at least 1 members.
View log file groups and members;
SYS@testdb> select group#,bytes/1024/1024 M,members from v$log;
Additional members in log group
SYS@testdb> alter database add logfile member ‘/u01/app/oracle/oradata/tes...
Cursor
Cursors are used to process multiple rows of records retrieved from the database (using SELECT statements). Using cursors, programs can process and traverse the entire recordset returned once retrieved one by one.
To process the SQL statement, Oracle will allocate a region in memory, which is the context area. This section contains the number of processed rows, pointers to the analyzed statement, and the entire section is the data row set returned by the query statement. The cursor refers to the handle or pointer of the context area.
Two. Classification of cursors:
...
1 create or replace procedure procedure_name --Stored procedure name
2 (
3 --Input / output quantities _name in out quantity type
4 --e.g.
5 username in varchar2, --varchar2Type does not need to indicate length.
6 id out number(38)
7 )
8 is/as
9 --Basically, is and as are the same, but slightly different, in this section you declare variables and constants // like the declare section in the PL / SQL statement block
10
11 --Variable / constant ...
Excerpts: https://www.linuxidc.com/Linux/2012-06/62894.htm
case when The conditional then condition is true when the value of else is false and the value is end.
--Query the number of times a unified field is equal to a value.
select count(m.underwriteflag) from prpcmain m where m.underwriteflag='1' ; --720407
select count(m.nationflag) from prpcmain m where m.nationflag='1' --720422
--Merge querySelectcount(case when m.underwriteflag='1' then 1 end)Field 1, count (case when m.nationflag='1'then 1 end) field 2 from prpcmain m;
The official category used is: drawNode
The function is drawNode:drawPolygon ().
C++The parameters of the function are as follows:
//Draw a polygon, verts is the point set, count is the number of points, fill color is the fill color, borderWidth is the edge line width, and borderColor is the edge line color.
void drawPolygon(Vec2 *verts, int count, const Color4F &fillColor, float borderWidth, const Color4F &borderColor);
luaUsing table as a point set
Code such asBelow:
function drawNodeRoundRect(drawNode, rect, borderWidth, radius, color, fillColor)
-- segmentsThe finer th...
Label: com SRC http file, it La method, SP as
Windows 7 64bitInstall Oracle Database 12C on it. The following error occurred:
Resolvent:
Step 1: Control Panel & gt; All Control Panel Items & gt; Management Tools & gt; Service & gt; SERVER Startup
Step 2: Control Panel & gt; All Control Panel Items & gt; Management Tools & gt; Computer Management & gt; System Tools & gt; Shared Folder & gt; Sharing
Right-click Share & gt; New Share & gt;
Click “Next Step” & gt;
Click Browse ...
