Results for "Database Optimization"
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Database Backup in SQL Server
In SQL Server, taking a database backup is crucial for data recovery and protection. Here’s a basic guide on how to perform a database backup and restore i…
Database trigger to audit (Transaction logs) all of the DDL changes made to the Database
Create table DatabaseLog: CREATE TABLE [dbo].[DatabaseLog]( [DatabaseLogID] [int] IDENTITY(1,1) NOT NULL, [PostTime] [datetim…
SQL Server System Databases
...kaam karte hain, to generally hum tables, queries aur user databases par focus karte hain. Lekin ek hidden backbone hota…
Master Database in SQL Server
Introduction SQL Server me agar koi ek database sabse zyada critical hai, to wo hai: Master Database Ye SQL Server ka core brain hai. Agar master database …
Table Partitioning in SQL Server
Table Partitioning एक advanced database concept है जिसका उपयोग बड़े tables को छोटे, manageable हिस्सों (partitions) में बाँटने के लिए किया जाता है। इससे pe…
SQL Server Agent Alerts, Operators, Database Mail & Job Activity Monitor
Production environment me sirf jobs schedule karna hi kaafi nahi hota. Hume monitoring aur notification system bhi chahiye hota hai taaki agar koi job fail…
Database Shrink in SQL Server
Database shrink ka matlab hai database file (ya log file) ke size ko chhota karna by removing unused space . Matlab, agar tumhare DB me data delete ho gaya…
Model & Resource Database in SQL Server
Introduction SQL Server ke system databases me kuch aise hidden heroes hote hain jo directly dikhte nahi, lekin bahut powerful role play karte hain. Aaj hum 2…
SQL Interview Q&A
Here are the questions along with their corresponding answers extracted from the provided context: What is SQL? SQL stands for Structured Query Language. I…
Spark SQL useful command
Spark SQL provides a variety of commands for managing databases, tables, and performing SQL operations. CREATE DATABASE IF NOT EXISTS demo; SHOW DATABASES;…
SYS and INFORMATION_SCHEMA
sys In Microsoft SQL Server, the sys schema is a special schema that contains system views and stored procedures that provide metadata about the SQL Server…
Databricks widgets
Input widgets allow you to add parameters to your notebooks and dashboards. You can add a widget from the Databricks UI or using the widget API. If y…
SQL Server Index Optimization Automation (Missing & Unused Index Management)
Got it! Yeh lo plain content — seedha copy karo apne blog mein. Pehle workflow diagram, phir poora blog content.Pehle workflow diagram — screenshot leke blog m…
What is catalog in Spark
...tem that keeps track of all the metadata related to tables, databases, functions, and oth…
In-Memory Databases (Data Warehouse Context)
🔹 In-Memory Database kya hoti hai? In-memory database wo database hoti hai jisme: 👉 Data hard disk par store nahi hota 👉 Data directly RAM (memory) me s…
Database Permissions in SQL Server
In SQL Server, database permissions control what actions users can perform on specific database objects (like tables, views, and stored procedures). Permis…
What is Blocking in SQL, How to solve blocking, and Kill Session
What is Blocking in SQL? Blocking occurs in SQL Server when one query or transaction holds a lock on a resource (like a row or table) and prevents other qu…
MSDB Database in SQL Server
SQL Server me ek aur powerful system database hai jo automation + scheduling ka backbone hai: MSDB Database
SQL Server Optimization Q&A
1. What is SQL Server Optimization? Answer: SQL Server Optimization ka matlab hota hai database ka performance better banana — jaise queries fast chalna, k…
MDF, NDF, LDF, and Filegroups
🔹 1. Filegroup kya hota hai? 🔸 Definition: Filegroup SQL Server में logical storage unit hota hai, jisme ek ya zyada data files hoti hain. Ye filegroups …
TempDB in SQL Server
Introduction SQL Server me ek aisa database hai jo har query, har process aur almost har operation me involve hota hai. Ye ek temporary w…
Log Shipping (Ship Log) in SQL Server
...o automatically send transaction log backups from a primary database on one serv…
How to find table column information by using SQL query
...etadata with SQL Server Stored Procedures When working with databases, understanding the structure of tab…
What is Data Ingestion and DataFrame API
Data ingestion : Data ingestion refers to the process of collecting, importing, and importing data from various sources into a system or storage environmen…
Index Rebuilding vs. Reorganization in SQL Server
As a database grows, maintaining optimal performance becomes crucial. One of the key contributors to performance degradation over time is index fragmentati…
What is the KDD (Knowledge Discovery in Databases)
In today's world, data is everywhere. Businesses, healthcare, banking, and even social media generate vast amounts of data every second. But raw data alone…
MongoDB connect with Python
Python needs a MongoDB driver to access the MongoDB database. We will use the MongoDB driver "PyMongo". # Creating a Database import pymongo myclient = pym…
SQL Server Deadlock & Performance Monitoring Made Easy
...ady-to-use stored procedures for faster troubleshooting and optimization.
What is the Replication in MS SQL server
Replication is a way to copy data from one database to another and keep them in sync. This is useful when you want the same data available in multiple plac…
Implementing Transactions,Error Handling, and Dynamic SQL in SQL
Think of a transaction as a complete package deal. It's like when you buy something from a store. You give them money, and in return, you expect to get the…
Find column in the whole database in sql server
To find a specific column in the whole database in SQL Server, you can query the information schema views. Here's a query you can use: SELECT table_name, c…
Understanding SQL Query for Identifying and Analyzing Default Values and Constraint in a Database
Default constraints in SQL are used to assign a default value to a column when no value is provided during data insertion. However, managing and auditing t…
Normalization in Databases
Normalization in a database is the process of organizing the data to reduce redundancy and improve data integrity. The main goal of normalization is to bre…
SQL Server Configuration Manager
Introduction Jab hum Microsoft SQL Server install karte hain , tab kuch important tools automatically install ho jate hain. Unme se ek bahut important tool…
SQL Server Administration – Management Tools Overview
...ion me hum mainly SQL Server ke management tools aur system databases ko samjhenge. SQL Server Management Tools Jab aap Microsoft SQL Server install…
What is a SQL Statement and types of SQL statements
...o perform various operations on data stored in a relational database. SQL statement…
What are Data warehouse, Data Lake ,data mining and DataMart and MetaData
Why a Data Warehouse? (Data Warehouse ki zarurat kyu hoti hai?) Aaj ke time me companies ka data multiple sources me store hota hai, jaise: • SQL Server da…
Understanding Cursors in +SQL Server: A Complete Guide
When working with databases, most SQL operations are designed to handle large sets of data at once. However, there are cases where you may need to process …
Understanding Stored Procedures in MSSQL
...group of SQL statements that are compiled and saved in the database. Instead of writing the same SQL qu…
SQL Server Management Studio (SSMS) – Complete Beginner Guide
SQL Server Management Studio Kya Hai? SQL Server Management Studio (SSMS) ek graphical interface (GUI tool) hai jisse aap SQL Server ke almost saare operat…
SQL MERGE statement
CREATE DATABASE SqlShackMergeDemo GO USE SqlShackMergeDemo GO CREATE TABLE SourceProducts( ProductID INT, ProductName VARCHAR(50), Price DECIMAL(9,2) ) GO …
Indexes in Data Warehouse
Database Me Data Kaise Store Hota Hai? Table ke rows disk par randomly store hote hain. Example: Row Customer_ID Sales 1 8 100 2 5 200 3 4 300 4 8 150 Agar…
What is an Index? Explain its different types in SQL
...SQL Server (इंडेक्स इन SQL सर्वर): Index SQL Server में एक database object (डेटाबेस ऑब्जेक्ट) है जो टेबल के डेटा को जल्दी से प्राप्त करने के लिए…
SQL SQL Server Agent: Automation Ka Powerhouse in SQL ServerServer Agent
Agar aap production environment me kaam kar rahe ho, to aapko pata hoga ki kuch tasks aise hote hain jo baar-baar karne padte hain — jaise daily backup len…
Data archive in SQL Server
A data archive refers to the process of moving inactive or less frequently used data from an operational system to a storage system , typically in a separa…
OLTP vs OLAP: A Beginner's Guide
...stands for Online Transaction Processing . It is a type of database system designed to handle a large number of short, quick operations,…
What are System Tables, File Tables, External Tables and Graph Tables in SQL Server
...al tables used by SQL Server to store information about the database and server itself. These are met…
What is Functions and Difference between Functions and Stored Procedures in SQL Server
What is a Function in sql : A function is a set of SQL Statements that perform a specific task. Basically, it is a set of SQL statements that accept only i…
Logical Query Processing Phases in SQL
SQL query processing consists of several logical phases, which describe the order in which SQL statements are evaluated. These phases help in understanding…
Data Import from text/CSV file in SQL Server
Step-by-Step Explanation 1. Checking and Dropping Existing Temporary Tables Before creating the temporary tables, the script ensures that any previously ex…
Triggers in SQL server
A trigger in SQL is a special type of stored procedure that runs automatically when certain actions happen in a table or view . A trigger cannot be explici…
Common Table Expressions (CTEs) in SQL
...Hierarchy Problem Imagine you are working with an employee database where each employee might report to a manager. Here's a sample table struc…
UNION, UNION All, INTERSECT, EXCEPT used in SQL Server
UNION : The UNION operator is used to combine the result sets of two or more SELECT statements into a single result set. It removes duplicate rows from the…
Added columns in a table by dynamic ways
IF OBJECT_ID('AddedDynamicColumn','P') IS NOT NULL BEGIN DROP PROC AddedDynamicColumn END GO CREATE PROCEDURE AddedDynamicColumn AS BEGIN SELECT ED.empid,E…
Row-Based vs Column-Based (Columnar) Storage
Database me table hume: Rows aur columns ke form me dikhti hai. Lekin internally data store hone ka tareeka alag hota hai. Do main storage types hote hain:…
SQL Server Agent Jobs & Schedules – Complete Practical Guide (Step-by-Step)
Agar aap SQL Server me automation samajh chuke ho, to next logical step hai SQL Server Agent Jobs aur Schedules ko practically use karna . Is blog me hum d…
What is SQL and what is it used for?
...e used for managing and manipulating data within relational databases. S…
Understanding Locking Hints in SQL Server: NOLOCK, ROWLOCK, and UPDLOCK
What Are Locking Hints? Locking hints are special options you can include in your SQL queries to tell SQL Server how to handle locks on the data being quer…
Pivoting and Unpivoting Data in SQL
Pivoting Data : Pivoting is the process of converting rows of data into columns, effectively changing the orientation of your data. It's useful when you ha…
Filtering the data with TOP and OFFSET-FETCH In SQL
TOP: SELECT TOP (5) productid, unitprice FROM Production.Products WHERE categoryid = 1 ORDER BY unitprice DESC; SELECT TOP (5) WITH TIES productid, unitpri…
How to use GOTO statement in SQL server
If you want to jump to a specific point in your SQL code, you can use the GOTO statement. The GOTO statement is used to exit a loop or a nested block of co…
How to one series with comma separate(any Delimiter) value split into in rows
If we have one series with comma separate(any Delimiter) value and we want split into in rows, I have create function for that: IF OBJECT_ID('TF_SplitSerie…
How to get first date of given date or month.
Get First date of month: SELECT DATEFROMPARTS(YEAR(GETDATE()), MONTH(GETDATE()), 1) AS FirstDayOfCurrentMonth Create function for that IF NOT EXISTS (SELEC…
How to comma separate value by using XML in SQL server
Before SQL Server 2017 (14.x), you can achieve the comma-separated values using the XML method. Here's an example of how you can achieve this: DECLARE @Sta…
What is the difference between DELETE and TRUNCATE statements in SQL?
--What is the difference between DELETE and TRUNCATE statements in SQL? --DELETE and TRUNCATE are both SQL commands that can be used to remove data from a …
Comparison of WHERE Clause Operators in MSSQL vs PostgreSQL
Here's a comparison of how operators in the WHERE clause are used in Microsoft SQL Server (MSSQL) vs PostgreSQL : Operator Purpose Used in MSSQL Used in Po…
Window Aggregate Functions in SQL
What is window function: Imagine you have a dataset with many rows, and you want to perform some calculations on each row based on a group of rows related …
SQL Server Data type
SQL Server provides a variety of data types to store different kinds of data efficiently. Here are some commonly used SQL Server data types: CHAR(size): A …
What is Big Data
Big Data refers to extremely large datasets that are too complex and voluminous to be processed and analyzed using traditional data processing tools and te…
What is Managed and External table in Spark
In Apache Spark, both Managed and External tables are used to store the data. However, there are significant differences in how Spark manages the data for …
What is MPP (Massively Parallel Processing)
...s run kar rahe hain ✔ Reports real-time chahiye Traditional database model is …
DBA
Setting up a lab environment for the course. Option 1 (Limited Resources) : Use a computer, laptop, or workstation with Windows 10 installed. Install SQL S…
Schema and Handling Corrupt data in PySpark
A schema in PySpark (and generally in data processing) defines the structure of a DataFrame, including the names and data types of each column. It serves a…
DAX (Data Analysis Expressions) Operators and Data Type in Power BI
Here's the list of DAX operators in a table format: Arithmetic Operators Operator Description Example + Addition = + - Subtraction = - * Multiplication = *…
What is RLS (Row-Level Security) in Power BI
RLS stands for Row-Level Security, which is a feature in Power BI (and also in SQL Server Analysis Services) that allows you to restrict data access at the…
What is Power BI
Power BI is a suite of business analytics tools developed by Microsoft that allows you to visualize and share insights from your data. Power BI consists of…
All Date Components in SQL
We get First Date , Last date ,month number, month Name,Year, Financial Year(Finyear), and Month Year from Date (Date Range of each single date). SET DATEF…
XML Data – Complete Conceptual Guide (SQL Server Perspective)
How insert data on table from XML in SQL server, example: There are two method for insert data in table from XML. DECLARE @XMLInput VARCHAR(MAX); SET @XMLI…
How to get first date From month and Finyear
If we have Finyear and month then we create a date for examples: DECLARE @finyear CHAR(5) = '202425'; DECLARE @month smallint = 5; --Get Year DECLARE @year…
ANY and ALL operators used in SQL
The ANY operator: returns a boolean value as a result returns TRUE if any of the sub-query values meet the condition Any means that the condition will be t…
What are Constraints in SQL?
SQL में constraints डेटाबेस टेबल में डेटा को सुरक्षित और सही बनाए रखने के लिए उपयोग किए जाते हैं। ये टेबल में डेटा की वैधता (validity) और अखंडता (integrity…
WAITFOR in sql server
The WAITFOR statement in SQL Server is used to introduce a delay or wait period in the execution of a batch, transaction, or query. WAITFOR DELAY '00:00:05…
What is View in SQL server
A view is a virtual table based on the result-set of an SQL statement. A view contains rows and columns, just like a real table. IF OBJECT_ID('ViewTable','…
How to use Magic (virtual) table INSERTED and DELETED in SQL server
Magic Tables are virtual tables that are automatically created and maintained by SQL Server for each data modification operation performed on a table. They…
Use of Apply(Cross and Outer) operator in SQL server
APPLY operator joins two table expressions. Also, I'll show how it differs from regular JOINs. Operator: CROSS APPLY Similar: INNER JOIN When to Use: Use a…
How to Two series with comma separate(any Delimiter) value split into in rows respectively
If we have two series with comma separate(any Delimiter) value and we want split into in rows, I have create function for that: IF OBJECT_ID('TF_SplitTwoSe…
Data Warehouse and Data Mining Syllabus
Yeh Data Warehouse and Data Mining ka complete syllabus list format me diya hai, bina explanation ke — sirf topics list: PART 1: Data Warehouse Syllabus Li…
Azure Data Factory (ADF)
Azure Data Factory (ADF) Kya Hai? Soch le tu ek delivery company chalata hai – jaise Swiggy/Zomato. Restaurant se khana uthaya → pack kiya → raste me check…
What is Data Lake
A data lake is a centralized repository that allows you to store all your structured and unstructured data at any scale. You can store your data as-is, wit…
What is Operational Data Storage (ODS)?
Data Warehouse padhte time ek topic aata hai jo thoda confusing hota hai: 👉 ODS (Operational Data Storage) Bahut log confuse ho jate hain: “Ye Data Wareho…
What Are OLAP Cubes
When we work with a Data Warehouse, one common goal is fast reporting and analysis . Business users don’t want to wait 30 seconds for a dashboard to load. …
Understanding DataFrames in PySpark
DataFrames are an important data structure in PySpark. They help in handling structured and semi-structured data efficiently. DataFrames are like tables in…
Data Pipeline and ETL (Extract, Transform, Load) Process/Tool and ELT
The ETL (Extract, Transform, Load) process/tool to collect, clean, and store data in a structured format. Extract (निकालना): सबसे पहले, डेटा को विभिन्न स्र…
What difference between between MySQL and MSSQL
Feature MySQL MSSQL Ownership Oracle Corporation Microsoft Licensing Open-source (GPL) and commercial versions Commercial with free Express Edition Operati…
Spark session vs Spark context
In Apache Spark, SparkSession and SparkContext are both essential components, but they serve different purposes and have different scopes. Here's a detaile…
Databricks, Apache Spark, Data Engineering and Science etc.
Azure Databricks is a platform on Microsoft Azure that helps with big data analysis and machine learning. It lets you work with large datasets easily and c…
SQL Server Multi-Level Approval Workflow with Auto Skip Logic
In many enterprise applications like HRMS, Travel Requests, Expense Approval, Purchase Approval , we need a multi-level approval workflow . But real system…