What is the fields?

The field tab is a menu for defining the fields for related table.

How can i define the variables for fields?

Those are the description for defining a new field for the related table ;

* Field Name : This variable is the main part of field value. The name which is typing to the box will be storing the indicator for the data.

* Field Type :

Data typeDescriptionMax sizeStorage
char(n)Fixed width character string8,000 charactersDefined width
varchar(n)Variable width character string8,000 characters2 bytes + number of chars
varchar(max)Variable width character string1,073,741,824 characters2 bytes + number of chars

ncharFixed width Unicode string4,000 charactersDefined width x 2
nvarcharVariable width Unicode string4,000 characters 
nvarchar(max)Variable width Unicode string536,870,912 characters 

Data typeDescriptionStorage
bitInteger that can be 0, 1, or NULL 
tinyintAllows whole numbers from 0 to 2551 byte
smallintAllows whole numbers between -32,768 and 32,7672 bytes
intAllows whole numbers between -2,147,483,648 and 2,147,483,647 4 bytes
bigintAllows whole numbers between -9,223,372,036,854,775,808 and 9,223,372,036,854,775,807 8 bytes
decimal(p,s)Fixed precision and scale numbers.

Allows numbers from -10^38 +1 to 10^38 –1.

The p parameter indicates the maximum total number of digits that can be stored (both to the left and to the right of the decimal point). p must be a value from 1 to 38. Default is 18.

The s parameter indicates the maximum number of digits stored to the right of the decimal point. s must be a value from 0 to p. Default value is 0

5-17 bytes

float(n)Floating precision number data from -1.79E + 308 to 1.79E + 308.

The n parameter indicates whether the field should hold 4 or 8 bytes. float(24) holds a 4-byte field and float(53) holds an 8-byte field. Default value of n is 53.

4 or 8 bytes

Data typeDescriptionStorage
datetimeFrom January 1, 1753 to December 31, 9999 with an accuracy of 3.33 milliseconds8 bytes

smalldatetimeFrom January 1, 1900 to June 6, 2079 with an accuracy of 1 minute4 bytes
dateStore a date only. From January 1, 0001 to December 31, 99993 bytes
timeStore a time only to an accuracy of 100 nanoseconds3-5 bytes

* Field Length : Decides the length for picked type in the form. ps: Only char, nchar, varchar, nvarchar, decimal objects can be set by this line. Other types are already declared before and no need to be set again.

* Decimal Digit : This fields is only possible to edit for decimal type and defines the currency digit

* Default Value : If this line is set and if there is no any value for this field then the given value for this line will be inserting to the table

* Is this field a primary key : If it is checked, this field assign as a unique area and the sistem will check the every execution for insert or update. The inserted or updated value must be unique otherwise the form will return an error to fix it.

* Is this auto increment field : When you make this line enable the sistem tries to run an increment for any insert function.

* Identity Increment : If this field has an auto increment option, this line defines the value for number of increment.

* Identity Seed : This line defines the beginning value for increment

* Is this field has a multi language support : If this line is checked then Aigap gets a equalled value for current language from language table


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