XQuery – position Function
The position function is used in FLOWR expression to get the position of an item in a sequence. Syntax position() Example XQuery Expression let $items := (1,2,3,4,5,6) return <result> <items> { for…
MySQLi – Using Sequences
A sequence is a set of integers 1, 2, 3, ... that are generated in order on demand. Sequences are frequently used in databases because many applications require each row…
MongoDB – Insert Document
In this chapter, we will learn how to insert documents into the MongoDB collection. The insert() Method To insert data into MongoDB collection, you need to use MongoDB's insert() or save() method. Syntax The…
Ruby – Object Oriented
Ruby is a pure object-oriented language and everything appears to Ruby as an object. Every value in Ruby is an object, even the most primitive things: strings, numbers and even…
XQuery – last Function
The last function is used to get the last item in the given sequence. Syntax last() Example XQuery Expression let $items := (1,2,3,4,5,6) let $lastElement := $items[last()] return <result> <lastElement>{$lastElement}</lastElement> </result> Output…
MySQLi – Clone Tables
There may be a situation when you need an exact copy of a table and CREATE TABLE ... SELECT doesn't suit your purposes because the copy must include the same…
MongoDB – Datatypes
MongoDB supports many data types. Some of them are − String − This is the most commonly used datatype to store the data. String in MongoDB must be UTF-8 valid.Integer − This…
XQuery – index-of Function
The index-of function is used to track items in the given sequence. It returns integers to indicate the availability of items in a given sequence. Syntax index-of($seq as anyAtomicType()*, $target as anyAtomicType())…
Ruby – Exceptions
The execution and the exception always go together. If you are opening a file, which does not exist, then if you did not handle this situation properly, then your program…
MongoDB – Drop Collection
In this chapter, we will see how to drop a collection using MongoDB. The drop() Method MongoDB's db.collection.drop() is used to drop a collection from the database. Syntax The basic syntax of drop() command…
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