Results for "Default Constraints"
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SQL Server me Default Constraint Maintenance System (Auto Fix + Logging + Rollback)
...ye problem zarur dekhi hogi: Different tables me different default values Constraint naming random…
SQL Server Database Shrink Maintenance
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 hai…
How to find table column information by using SQL query
Comprehensive Guide to Fetching Table and Column Metadata with SQL Server Stored Procedures When working with databases, understanding the structure of tab…
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…
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…
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…
Dynamic CREATE TABLE Script in SQL Server
DECLARE @TableName NVARCHAR(100) = 'Employee'; DECLARE @SQL NVARCHAR(MAX) = ''; DECLARE @PKCols NVARCHAR(MAX) = ''; -- Get Primary Key Column(s) SELECT @PK…
Understanding Default Size of VARCHAR in SQL Server
Introduction When working with SQL Server, developers often use the VARCHAR data type to store variable-length character data. However, many overlook a cri…
Statistics in SQL Server
Statistics SQL Server ke “mind” jaise hote hain. Ye SQL Server ko batate hain ki table me data kis tarah se distribute hai — jaise kitne values unique hain…
What is an Index? Explain its different types in SQL
✅ Index in 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 Server Index Optimization Automation (Missing & Unused Index Management)
Pehle Basics — Index Hota Kya Hai? Simple bhaasha mein — index ek kitaab ka index page hota hai. Jaise tum dictionary mein "Zebra" dhundne ke liye seedha Z sec…
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…
What is catalog in Spark
In Apache Spark, the catalog refers to the internal management system that keeps track of all the metadata related to tables, databases, functions, and oth…
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 …
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…
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 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…
Understanding show() in PySpark
In PySpark, the .show() function is used to display DataFrame content in a tabular format. Syntax of show() DataFrame.show(n=20, truncate=True, vertical=Fa…
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 …
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…
Working with NULL/None Values in PySpark
🔍 What's fillna() or fill() in PySpark? In PySpark, both fillna() and fill() are used to replace null or missing values in a DataFrame. Both fillna() and …
How to Read and Write file into DataFrame by using Pyspark
# dataframe reader API.... spark.read.format("") \ .option("key":"value") \ .schema(schemavariable) \ .load() # dataframe write API...... spark.write.mode(…
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…
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…
USERELATIONSHIP function In Power
...en the same tables but only one can be active at a time. By default,…
Analyzing Data from Pandas
data = { "Duration":{ "0":60, "1":60, "2":60, "3":45, "4":45, "5":60 }, "Pulse":{ "0":110, "1":117, "2":103, "3":109, "4":117, "5":102 }, "Maxpulse":{ "0":…
How to Create table in Power BI using Dax
ROW: The ROW function in DAX creates a single row table with the specified columns and values. ROW(columnName1, value1, [columnName2, value2], ...) Si…
Date Time in Power BI
In Power BI and DAX, the CALENDAR() and CALENDARAUTO() functions are used to generate a table of dates. These functions are particularly useful for creatin…
MSDB Database in SQL Server
SQL Server me ek aur powerful system database hai jo automation + scheduling ka backbone hai: MSDB Database
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…
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…
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…
Advance Python Concept
The @property decorator in Python is used to make a method behave like an attribute . It allows you to define getters, setters, and deleters in an elegant …
File Handling(create, read, write, and delete files etc.)
File Handling in Python allows us to create, read, write, and delete files . It's an essential feature when working with data that needs to be stored perma…
Python Basic
py --version python --version # \n : Newline # \t : Tab # \\ : Backslash # \" : Double quote # \' : Single quot print("Hello, World!\nThis is a new line.")…
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…
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 …
Slowly Changing Dimensions (SCD)
Data Warehouse me ek bahut important concept hota hai: 👉 Slowly Changing Dimensions (SCD) Jab hum dimensional modeling karte hain, hum assume karte hain k…
The ALTER TABLE statement in Microsoft SQL Server (MSSQL) and PostgreSQL
The ALTER TABLE statement in Microsoft SQL Server (MSSQL) and PostgreSQL is used to modify the structure of an existing table. It allows you to: Add, drop,…
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…
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…
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…
Seaborn
Seaborn is a powerful and easy-to-use data visualization library in Python built on top of Matplotlib. It's great for creating attractive and informative s…
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…
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…
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…
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 …
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…
SQL Server System Databases
Introduction SQL Server me jab hum kaam karte hain, to generally hum tables, queries aur user databases par focus karte hain. Lekin ek hidden backbone hota…