Mac OS shutdown and then finding no system at startup
OS x 10.11.6, on my iMac, it suddenly restarts but can't find the boot system (screen, gray "not signed" alternating with file with? inside). I start to get disk utility, perform first aid, he said that everything is OK. I start again. Once it worked. Then, it does not work. I tried reinstalling OS X, but when it was time for the computer to restart, he could not find the start. This time I went to Disk Utility (for access using cmd - R), which leave until I had to start and selected my Macintosh HD to restart (the only option). He did. But I fear that the problem is still there. Is there another way to find out where is the problem? Anyone no matter what putting on what to do next? Thank you.
Reset the NVRAM
How to reset the NVRAM on your Mac - Apple Support
then run AHT
Using Apple Hardware Test - Apple Support
Tags: Mac OS & System Software
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Grouping and then find the min and max
DROP TABLE purge of y;
CREATE TABLE y
(
ID NUMBER (10),
START_DATE_TIME NUMBER (15),
END_DATE_TIME NUMBER (15)
);INSERT INTO y VALUES (1, 20140602164819, 20140606140851);
INSERT INTO y VALUES (1, 20140827141743, 20140827142131);
INSERT INTO y VALUES (1, 20140827141744, 20140827141835);
INSERT INTO y VALUES (1, 20140827141744, 20140827142131);
INSERT INTO y VALUES (1, 20140827141944, 20140827142131);
INSERT INTO y VALUES (1, 20140827141944, 20140924142131);
INSERT INTO y VALUES (1, 20140927141944, 20141027142131);
INSERT INTO y VALUES (2, 20140602164819, 20140606140851);
INSERT INTO y VALUES (2, 20140827141743, 20140827142131);
INSERT INTO y VALUES (2, 20140827141744, 20140827141835);
INSERT INTO y VALUES (2, 20140827141744, 20140827142131);
INSERT INTO y VALUES (2, 20140827141944, 20140827142131);
INSERT INTO y VALUES (2, 20140827141944, 20140924142131);
INSERT INTO y VALUES (2, 20140927141944, 20141027142131);COMMIT;
Select
*
Of
There
order by 2, 3;out necessary: when the output of the table are sorted by start_date_time and end_date_time in ascending order.
and when the value of for a particular id start_date_time is located between the
another set of values start_date_time and end_date_time for the same id then min (start_date_time) and max (end_date_time) is the desired output.and if there is no overlap then (start_date_time) min and max (end_date_time) is the output desired.
and for each line of the output in ascending order of line number order addd;
Example output is in the output table named
drop table output is serving;
create an output table
(
ID NUMBER (10),
START_DATE_TIME NUMBER (15),
END_DATE_TIME NUMBER (15),
ROW_NUMBER NUMBER (10)
);
Values to INSERT OUTPUT (1, 20140602164819, 20140606140851, 1);
Values to INSERT OUTPUT (1, 20140827141743, 20140924142131, 2);
Values to INSERT OUTPUT (1, 20140927141944, 20141027142131, 3);
Values to INSERT OUTPUT (2, 20140602164819, 20140606140851, 1);
Values to INSERT OUTPUT (2, 20140827141743, 20140924142131, 2);
Values to INSERT OUTPUT (2, 20140927141944, 20141027142131, 3);COMMIT;
SELECT
*
Of
output
ORDER BY 1,2,3,4;Thank you
SQL_Novice
Hello
Your postal code. It is difficult to tell what you're doing wrong without knowing what you are doing.
user6166680 wrote:
Hi Frank:
Max works for ID 3 values only because there is only one group here, as all other values compared, they overlap with max (end_date_time);
but when I use MAX for ID 1 and 2, the result set is not the same thing as LAG works because there is a GAP...
Exactly, you have to find the gaps. If start_date_time is less than or equal to the MAXIMUM of all the end_date_times earlier, then it isn't a gap; Otherwise, there is a gap.
What is the problem with MAX?
WITH got_new_group AS
(
SELECT id, start_date_time and end_date_time
CASE
WHEN start_date_time <= >= > MAX (end_date_time) OVER (PARTITION BY id )
ORDER BY start_date_time
end_date_time
ROWS BETWEEN UNBOUNDED PRECEDING
AND 1 PRECEDING
)
THEN 0
1. OTHER
END AS new_group
OF y
)
got_group_number AS
(
SELECT id, start_date_time and end_date_time
SUM (new_group) OVER (PARTITION BY ID.
ORDER BY start_date_time
end_date_time
) AS group_number
OF got_new_group
)
SELECT id
MIN (start_date_time) AS group_start_date_time
MAX (end_date_time) AS group_end_date_time
group_number
OF got_group_number
GROUP BY id, group_number
ORDER BY id, group_number
;
You will notice that it is exactly what I posted earlier, in response #5, except that instead of using the OFFSET it uses MAX.
Output:
ID GROUP_START_DATE_TIME GROUP_END_DATE_TIME GROUP_NUMBER
--------------- --------------------- ------------------- ---------------
1 20140602164819 20140606140851 1
1 20140827141743 20140924142131 2
1 20140927141944 20141027142131 3
2 20140602164819 20140606140851 1
2 20140827141743 20140924142131 2
2 20140927141944 20141027142131 3
3 20140330041350 47121231000000 1
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Hello
see if this information helps you
How to make a backup of your data
http://www.vista4beginners.com/how-to-backup-your-data
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http://www.vista4beginners.com/how-to-restore-files
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http://www.bleepingcomputer.com/tutorials/tutorial145.html
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http://www.bleepingcomputer.com/tutorials/tutorial144.html
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install an update in Windows Vista and Windows 7
http://support.Microsoft.com/kb/949358------------------------------------------------------
Once you are in Windows I was running once again reset here as a precaution.
How to reset the Windows Update components?
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