by RANGE (SAL)(PARTITION p1 VALUES less THAN (10000),PARTITION P2 VALUES less THAN (20000),PARTITION P3 VALUES less THAN (30000));Add two new partitions:sql> ALTER TABLE emp_part ADD PARTITION P4 values less THAN (35000), PARTITION P5 values less THAN (40000);Similarly, as long as the MaxValue partition does not exist, you can add multiple new partitions to a list and system partition table.How to delete and truncate multiple partitions/sub-partition
: compute-intensiveMultithreading: IO-intensiveComputationally intensive: Multiple processes should be usedFrom multiprocessing import ProcessFrom threading Import ThreadImport Os,timeDef work1 ():Res=0For I in Range (100000000):Res*=iDef WORK2 ():Res=0For I in Range (100000000):Res*=iDef WORK3 ():Res=0For I in Range (100000000):Res*=iDef work4 ():Res=0For I in Range (100000000):Res*=iif __name__ = = ' __main__ ':L=[]# Print (Os.cpu_count ()) # (calculates the number of CPUs) This machine is 4 c
table in the range partition is partitioned in one of the following ways, with each partition containing the rows of the values of the partition expression in a given contiguous interval
The code is as follows
Copy Code
Create a range partition table mysql> CREATE TABLE IF not EXISTS ' user ' (-> ' id ' int (one) not NULL auto_increment COMMENT ' user ID ',-> ' name ' varchar not NULL DEFAULT ' COMMENT ' name ',-> ' sex ' int (1) not NULL DEFAULT ' 0 ' COMMENT ' 0 i
of these gpio, that is, ordinary IO port money, they must be set in the GPIO mode, to ensure that their other functions, such as the ad serial port, the latter PWM and so on are not open.
This will set up the MFP register: Generally, we follow a step to operate the normal IO port,
void Led_init (void)
{
/* Configure p4.0-p4.5 as GPIO mode */
_SYS_P40_MFP (Sys_mfp_p40_gpio);
_SYS_P41_MFP (Sys_mfp_p41_gpio);
_SYS_P42_MFP (Sys_mfp_p42_gpio);
_SYS_P43_MFP (Sys_mfp_p43_gpio);
_SYS_P44_MFP (Sys_mfp_p
Connect to the remote CDB and prepare the remote PDB for cloning.Select from V$pdbs; con_id DBID NAME open_mode------------------------------------------------------------ 2 1258043702 pdb$seed READ only 3 3749525766 PDB1 READ only42192587015 P4 mounted 5 255759235 pdb_test READ WRITECreate a user in th
p2 values less than (20000 ),
PARTITION p3 values less than (30000)
);
Next let's add several new partitions:
SQL> ALTER TABLE emp_part ADD PARTITION
PARTITION p4 values less than (35000 ),
PARTITION p5 values less than (40000 );
Similarly, you can add multiple new partitions to the list and system partition tables, provided that there are no maxvalue partitions on these partition tables.
2.2. If multiple partitions or subpartitions are deleted and t
In the face of a variety of CPUs, how can we see the performance of a single CPU at a glance?
The following describes the factors affecting the performance of mainstream CPUs and the overall performance calculation formula.
1. There is no doubt that the performance of CPU of the same type is proportional to the clock speed, and it is basically linearly related. For example, the p4660 performance of 3.6g is about 20% stronger than that of p4630 of 3.0g.
2. Architecture is the most important facto
. It is wrong to modify the corresponding second-level cache key value in the Registry to enable the second-level cache. It is just a ing. If the second-level cache is not enabled, the computer performance will be very affected.In Windows XP, the second-level CPU cache is not enabled by default. To improve system performance, we can enable it by modifying the registry or using software such as "Windows optimization master.Run the Registry Editor, expand the HKEY_LOCAL_MACHINE \ SYSTEM \ CurrentC
Cause Description: the following problem occurs: 1. two identical purchase warehouse receiving ticket records are displayed in the purchase details of the procurement module. general ledger system and receivables payable reconciliation, a fraction of the difference, (estimated to be rounding the problem) Before I have played the U8-V861-21-060510120000-U861SP1 appeared above the problem, the implementation of support instructions to play U8-V861-0541-93093 patch, (This patch depends on the KB-U8
Recently began to prepare for the computer level four, basically did not encounter any problems, I feel that the computer level four is to test the understanding of memory, the banker algorithm is a problem in the computer four of the few computational problems.
Example 1. There are three types of resources (A,B,C) and five processes (P1,P2,P3,P4,P5) in the system, and the number of 17,B resources is the number of 6,c resources is 19. The status of th
occupancy rate3. How often does the server restart4. The difference between Xeon and ordinary P4 CPUThe difference between 5.IDE and SCSI hard drives6. What is the real ICP card7.CGI and PHP than ASP security error8. The server put in Beijing and Shanghai and so on the speed really fast?
A. Space-type
1. How to view the size of space
After you log in to FTP, you will see in the Information box
Maximum disk Quota limited to 300000 Kbytes (your space i
)(PARTITION p1 VALUES less THAN (10000),PARTITION P2 VALUES less THAN (20000),PARTITION P3 VALUES less THAN (30000));Let's add a few new partitions below:sql> ALTER TABLE Emp_part ADD PARTITIONPARTITION P4 VALUES less THAN (35000),PARTITION P5 VALUES less THAN (40000);Similarly, you can add multiple new partitions to the list and system partition tables, provided that there are no maxvalue partitions on these partitioned tables.2.2. If you delete and
(20000),PARTITION P3 VALUES less THAN (30000));Let's add a few new partitions below:sql> ALTER TABLE Emp_part ADD PARTITIONPARTITION P4 VALUES less THAN (35000),PARTITION P5 VALUES less THAN (40000);same. You can add multiple new partitions to the list and system partition tables, provided that there are no maxvalue partitions on these partitioned tables .2.2. Suppose to delete and truncate multiple partitions or sub-partitionsas part of data mainten
Query all:SELECT p3.id, P3. Name, P3. AddtimeFrom (SELECT Name, MAX (addtime) as MaxaddtimeFrom Product as P1GROUP by Name) as P2INNER JOIN Product as P3 on P2. Name = P3. NameORDER by P2. Maxaddtime DESC, P3. Addtime desc, p3.id descPagination of the front and back top method (5 rows per page, 5th page, i.e. 第21-25 rows of data)(1) Take the first 25 lines in the order required, (2) Top 5 lines, (3) reverse the order backSELECT p5.id, P5. Name, P5. MaxaddtimeFrom(SELECT TOP 5
-wesley Professional
WPF Unleashed by Adam Nathan
Sams Publishing
XUnit Test patterns:refactoring Test Code by Gerard Meszaros
Addison-wesley Professional
Change/config Management
Accurev 4.6 for ClearCase
Accurev INC.
Fisheye
Atlassian (formerly Cenqua)
IncrediBuild
Xoreax Software
Perforce SCM System
The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion;
products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the
content of the page makes you feel confusing, please write us an email, we will handle the problem
within 5 days after receiving your email.
If you find any instances of plagiarism from the community, please send an email to:
info-contact@alibabacloud.com
and provide relevant evidence. A staff member will contact you within 5 working days.