Angular 2 offers developers two technologies for building forms: template-driven forms and reactive forms. Both technologies are part of the @angular/forms library and contain the same set of form control classes. At the same time, they offer different programming styles and techniques and refer to different modules: FormsModule and ReactiveFormsModule, respectively.
JOIN, UNION, INTERSECT and EXCEPT in SQL
Joining tables in a SELECT query is done using the JOIN statement.
Grouping in SQL: GROUP BY clause, HAVING clause and aggregate functions
The GROUP BY clause (SELECT statement) allows you to group data (rows) by the value of a column or multiple columns or expressions. The result will be a set of summary rows.
Continue reading Grouping in SQL: GROUP BY clause, HAVING clause and aggregate functions
INSERT, UPDATE and DELETE in SQL
SQL uses INSERT, UPDATE, and DELETE statements to modify data.
SELECT in SQL
Select – performs a selection (extraction of individual rows) and/or a projection (extraction of individual columns) of the data and returns the result set.
Simple option:
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SELECT [ALL | DISTINCT] column_list FROM {table1 [tab_aliasl]},... |
C#: Data Types
A type is some general scheme of value (data). A variable is a piece of memory that can contain different values (as opposed to a constant, which can only contain one value). The range of possible values for a variable is determined by its type.
C#: syntax
Syntax and other highlights of C#.