Why is IN() considered O(logN) operation?

Why is IN() considered O(logN) operation?

Content Index :

Why is IN() considered O(logN) operation?
Tag : mysql , By : Priya
Date : November 25 2020, 01:01 AM

No Comments Right Now !

Boards Message :
You Must Login Or Sign Up to Add Your Comments .

Share : facebook icon twitter icon

How to implement O(logn) decrease-key operation for min-heap based Priority Queue?

Tag : algorithm , By : Gerhard Miller
Date : March 29 2020, 07:55 AM
With these it helps You can do following: store a hashmap inside your heap that maps your heap values to heap indexes. Then you should extend your usual heap-logic just a bit:
on Swap(i, j): 
    map[value[i]] = j; 
    map[value[j]] = i;
on Insert(key, value): 
    map.Add(value, heapSize) in the beginning;
on ExtractMin: 
    map.Remove(extractedValue) in the end;
on UpdateKey(value, newKey): 
    index = map[value]; 
    keys[index] = newKey; 

balanced binary tree, order and between operation in O(logn)

Tag : algorithm , By : snk
Date : March 29 2020, 07:55 AM
fixed the issue. Will look into that further But I ran into a challenge when I took an exam some days ago. ,
How to find the order of one given element?
find(x, node)
  if node is null return error
  if node is x return node
  if node < x return find(x, left(node)) else return find(x, right(node))
order(x, node, acc)
  if node is null return acc
  if node is x return acc + count(left(x))
  if node < x return order(x, left(node), acc) 
  else return order(x, right(node) , acc + 1 + count(left(node)) )

Why is the merge function of binomial heaps O(logN) rather than O(logN * logN)?

Tag : algorithm , By : Christopher
Date : March 29 2020, 07:55 AM
I think the issue was by ths following , You probably don't understand the algorithm. When we have two trees of same order, we don't "merge (O (1)) it and insert (O (log N))". You think that when we get such "merged" tree we leave it and at the end, we insert it node by node, right? Then to make it O (logN): When you have two trees of order k, you merge them and get one tree of order k+1. Now, depending on how many k+1 order trees you have from heaps you are merging, you have one, two or tree k+1 order trees:
if 1 this tree is just a part of the merged heap

Why is code like i=i*2 considered O(logN) when in a loop?

Tag : development , By : jch
Date : March 29 2020, 07:55 AM
will be helpful for those in need Look at 1024 = 210. How many times do you have to double the number 1 to get 1024?
Times    1   2   3   4    5    6    7    8     9      10
Result   2   4   8   16   32   64  128  256   512    1024

Analyze BIg O relation between weird math expressions (logN)^logN and n/logN

Tag : math , By : user130518
Date : March 29 2020, 07:55 AM
Related Posts Related QUESTIONS :
  • MySQL Full-text Search Workaround for innoDB tables
  • MySQL transaction and trigger
  • What is an easy way to design MySQL Queries?
  • Remove HTML tags from record
  • Alternative to Intersect in MySQL
  • Insert a bunch of duplicate rows into a mysql table
  • Explain this SQL query in plain English
  • Need an alternative to two left joins
  • Wordpress Access WP-Admin when installed in a sub directory
  • How to query fields with MySQL-Regex that contain thousand separator?
  • TomEE JPA MySql Configuration "An invalid Lifecycle transition was attempted"
  • Update a row with data from another row in the same table based on a similar field
  • SequelizeConnectionRefusedError: connect ECONNREFUSED
  • Getting ER_PARSE_ERROR when using Intersect and multiple input vaules of email format
  • Laravel get many objects in one object
  • MySql: How do I sort a query by 2 specific categories and then by price?
  • Generating monthly report mysql
  • getting error in Sql Query incorrect syntax near ')'
  • MariaDB/MySQL select query replace json array of ids into concatenated values
  • How to create a MySQL Query to get sales for each date of month (Like Calendar)?
  • Insert query fails with error duplicate entry , where as select query returns null
  • MySQL - ORDER BY multiple words, then alphabetically?
  • With a one-to-many relation, how do you get every row of table A if table B doesn't reference some rows of A?
  • How to add temporary column with data with MYSQL?
  • Why is subquery join much faster than direct join
  • Under standing Update Queries, and how many sets one query can have
  • How to select multiple values in a subquery but have each value assigned to matching parent select value?
  • SQL getting a column to match multiple conditions in CASE
  • Converting date operation from MySQL to PostgreSQL
  • MySQL - Join these subqueries into a single query
  • Show the list of all product's names ordered along with first and last names of the customers
  • Mysql `OR` condition doesn't work with JOIN
  • how can I hide the data that my controller returns making a CRUD in Laravel & vue.js?
  • Sum of values for all accounts using the most recent date for each
  • MySQL Query between three tables (with also ORDER and LIMIT)
  • MySQL date_format () function vs SQL Like operator
  • How to Combine two select and two where clause?
  • How to convert this (strange formated) data ? a:5:{s:15:"nc_notification";s:1:"2";s:20:"iso_add
  • SELECT result within select isn't reachable?
  • How to call stored procedure at sqlfiddle?
  • How Do I convert this table from row to column?
  • Mysql check if table has any value
  • Mysql Index misbehave in rails
  • Calculate number of students per class without using a JOIN
  • "new ephemeral certificate expires too soon: current time:"M
  • How to write this SQL (about date and time)?
  • What would take longer to execute in a million row table LIMIT 37,22 or LIMIT 100037,22
  • Can't connect a spring-boot 2 service to mysql in a different container
  • Insert statement using variable in sql query
  • Getting all users except admins in many-to-many relationship
  • How to pass the data from modal to MYSQL using VueJS
  • MYSQL - get a row from a table in every database
  • date type casting in npm package?
  • GROUP BY a, b VS GROUP BY b, a
  • How to store multiple values on a mysql table
  • 2 SELECT in a query with ORDER BY
  • BigQuery: How to run cohort / retention analysis for userbase across 2.5 years?
  • Can't connect local database. Sequel Pro encountered an unexpected error
  • How do I change the auto increment counter in MySQL from +1 to +43
  • How to query non duplicate rows but keep the primary key
  • shadow
    Privacy Policy - Terms - Contact Us © scrbit.com