Tags: share for me install JDK LAN NSF MYSQ process target primary key auto-increment from:https://my.oschina.net/simpleton/blog/525675 First, what is ETL ETL, an abbreviation of English extract-transform-load, is used to describe the process of extracting data from the source (Extract), converting (Transform), loading (load) to the destination. The term ETL is more commonly used in data warehouse, but its
Data type
Defining identifiers
Number of bytes
Range of values
Range of values
Short-integer
short [int]
2 (16-bit)
-32768~32767
-215~215-1
Integral type
[Long] int
4 (32-bit)
-2147483648~2147483647
-231~231-1
Long
Integer is a number in Z {...,-2,-, 1, 2. Integer can be in decimal, octal, or hexadecimal format.
In octal notation, the number must start with 0 (0;
In hexadecimal notation, the number must begin with 0x (Zero x) or 0X (zero capital X;
Integer overflow: when an integer overflows, it is automatically converted to the
An example of DB2 data recovery: SQL0928N
The environment is AIX 6.1 and DB2 9.7.0.7.First, check whether the db2 master process exists.Ps-ef | grep db2sysIf the database does not exist, use db2start to open the database.The backup media is a cold backup data source,Cd to th
Tags: vb oracle integer1. I used to think that Integer=number (38,0)--38 is number's maximum precision integer is a very large data type, which can be represented as power (10,126)-1 because a byte maximum represents 256, Then n bytes Max represents power (256,n) >=power (10,126) n=53, and an
Today we will mainly talk about the DB2 data type. We all know that DB2's built-in data types can be divided into numeric, string character string, and graphic string), binary string type binary string) or datetime ).
There is als
Integer is a number in Z {...,-2,-, 1, 2. Integer can be in decimal, octal, or hexadecimal format.
In octal notation, the number must start with 0 (0;
In hexadecimal notation, the number must begin with 0x (Zero x) or 0X (zero capital X;
Integer overflow: when an integer overflows, it is automatically converted to the
Integer can be in decimal, octal, or hexadecimal format.In octal notation, the number must start with 0 (0;In hexadecimal notation, the number must begin with 0x (Zero x) or 0X (Zero capital X;Integer Overflow: When an integer overflows, it is automatically converted to the float type. Similarly, if the
the time type contains hours, minutes, seconds, so the dates and time types are converted, refer to the following table. Number The number types in Oracle can correspond to many of the types in db2/400, depending on what type of data Oracle is using to hold, whether it is integer
This article examines the metadata of IBM DB2 Universal Database to dynamically build views and forms, including how to dynamically generate a new clx form and convert the form stream to Delphi. PAS and. XFM files and add them to the kylix and Delphi clx projects.
IntroductionIn the previous article, I checked the metadata of IBM DB2 Universal Database (UDB) to dynamically build views and forms. I used Bor
precision FLOAT or DOUBLE data type described earlier in this section.
The FLOAT (p) syntax is compatible with ODBC.
· DECIMAL [(M [, D])] [UNSIGNED] [ZEROFILL]
The number of strictly compressed points. M is the total number of decimal places (precision), and D is the number of digits after the decimal point (scale. The '-' sign of the decimal point and (negative number) is not included in M. If D is 0, th
TreeSet
List:
ArrayList
Double row setMap:
HashMap
TreeMap
Additional knowledge:
//
// Vernacular: restrict the Data Types of stored data
// The first String limits the Data Type of the key to the String type.
// The second String limits the
an enumeration type of orientation, it will naturally transfer the type defined in orientation; in addition, if other values, such as 0 or 1, are passed, the compiler will not agree.Sadly, almost all APIs in Android are defined as integer sets. Therefore, you must always remind yourself and the people in the group to pass the constants in the defined
Basic knowledge of Python:Basic data type: int str list tuple dict boolThe attribute function of integral type1. Factory method converts a string into an integer type1 " 1234 " 2 b = int (a)3print(b)4print(type (b), b) # To view the type and return the value of B 5 # c = '
I. Integer type
C # defines the integer type in 8: byte, unsigned byte, short, and ushort) INTEGER (INT), noneSymbol INTEGER (uint), long integer (long), and unsigned long
String, Integer, int type conversion summary, integerint
Today I learned the concept of encapsulation. It is very interesting to change the data type by means of automatic packing and unpacking. At the same time, mutual conversion between them is worth remembering. Of course, practice makes perfect at work, just to sor
Data type feature range
sbyte signed 8-bit integer between 128 to 127
byte unsigned 8-bit integer between 0 to 255 short Signed 16-bit integers between 32768 to 32767
ushort unsigned 16-bit integer between 0 to 65535
int si
, in a program you can define an integer variable num, which is different from the NUM in student and does not affect each other. 2. Initialization of struct variables.struct Student{int num;Char name[20];char sex;int age;Float score;Char addr[30];}student1={10001, "Wangjiun", "M", 19,90.5, "Sahgnhai"};You can also separate the declaration and definition types and initialize them when defining variables. Such asStudent student1={10002, "Chengong", ' f
width for the integer type, for example, int (11). This is meaningless for most applications: it does not limit the valid range of values, it only requires some mysql interaction tools (such as the mysql command line client) to display the number of characters. For storage and computing, int (1) and int (20) are the same. 2. mysql date type: MySQL date
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