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SQL Tips Select>>Delete>>Truncate. One Wrong command of Truncate can ruin your career #SQL #SQLTip

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#SQLTip: Use the GROUP BY clause to group rows in a result set based on one or more columns and aggregate the data using functions like SUM(), AVG(), etc. #SQL #Database

#SQLTip: Use the OFFSET keyword to skip a specified number of rows in the result set. For example: ```sql SELECT * FROM table_name OFFSET 10 ROWS ``` This will return all rows starting from the 11th row. #SQL #Database #DevTip

#SQLTip 💡 Use the `NOT LIKE` operator to exclude specific patterns in your queries. Example: ```sql SELECT * FROM customers WHERE name NOT LIKE '%John%' ``` This query returns all customers whose name doesn't contain the string "John". #SQL #Database

#SQLTip Dynamically calculate the number of rows in a table: ```sql SELECT COUNT(*) FROM table_name; ``` Quick way to get the count without having to explicitly specify the column name. #Database #SQLServer #DataAnalytics

#SQLTip Use CTEs (Common Table Expressions) to create reusable subqueries and improve readability. ```sql WITH OrderedProducts AS ( SELECT * FROM Products ORDER BY Name ) SELECT * FROM OrderedProducts; ```

#SQLTip Count rows with a specific value? ``` SELECT COUNT(*) FROM table_name WHERE column_name = 'value'; ``` Quickly get a count of rows that match a specific criteria. #Database #SQL

#SQLTip Use DISTINCT clause with an aggregate function to return unique values. ```sql SELECT DISTINCT SUM(quantity) FROM sales; ``` This query will return the total quantity sold for each unique product. #SQL #Database

#SQLTIP: To check if a column allows null values, use the IS NULLABLE constraint. For example: ```sql SELECT COLUMN_NAME, IS_NULLABLE FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME = 'MyTable'; ```

#SQLTip: Use the COALESCE() function to return the first non-NULL value in a list of expressions. Example: ``` SELECT COALESCE(first_name, last_name) AS full_name FROM users; ```

#SQLTip: Use "NOT IN" instead of multiple "NOT =" for better performance when filtering multiple values from a large table eg: SELECT * FROM table WHERE id NOT IN (1, 2, 3, 4, 5); #Faster Performance #SQL #Database #PerformanceOptimization

#SQLTip: Use the COALESCE() function to return the first non-null value from a list of expressions. e.g., ```sql SELECT COALESCE(name, email) FROM users; ``` This returns the name if it's not null, otherwise it returns the email. #SQL #Database

#SQLTip: Optimize your queries by using indexes to speed up data retrieval. Indexes act like signposts in a database, helping the database quickly locate and retrieve specific rows of data. #SQL #DatabaseOptimization #QueryPerformance

#SQLTip Improve your #SQL queries with the power of window functions! Calculate running totals, moving averages, and more with ease. #Database #DataAnalytics

#SQLTip: Use the "DISTINCT" keyword to return only unique rows in a result set, eliminating duplicate records. Example: ```sql SELECT DISTINCT name, age FROM users; ``` This query will return a list of all the unique names and ages in the users table. #SQL

Deep dive into the interconnected world of SQL! 🌐🔗 Gain mastery over joining multiple tables. It's like piecing together a puzzle, each piece revealing a part of your data's story. Cherish the process 🧩 #DataScience #SQLTip

#SQLTip: Use the "HAVING" clause to filter grouped data. Eg: `SELECT category, SUM(sales) AS total_sales FROM sales GROUP BY category HAVING total_sales > 1000` #SQL #DatabaseTips

#SQLTip Use a "WHERE" clause to narrow down your query results - it's the best way to speed up your database queries! #programming

#SQLTip: Use JOINs to quickly access and combine data from multiple related tables. It'll make your life a lot easier! #SoftwareEngineer

#SQLTip: Use the GROUP BY clause to perform aggregation operations on multiple columns, allowing for more complex operations. #programming

#SQLTip: To make retrieving information from your tables faster, create indexes! Indexes improve query performance & reduce disk IO. #Programming

#SQLTip: Always include at least one index on all frequently used columns to speed up query performance. #programming #SQL

#SQLTip: Always use table aliases to make your queries easier to read and troubleshoot! #Programming #Code #Database

#SQLTip: When writing SELECT queries, use column aliases to make the results easier to read. #programming #databases

#SQLTip: Use aggregate functions to transform data from multiple rows into one summary row. Ex: SUM(), MIN(), MAX()

Mastering Conditional Analysis with ClickHouse's IS Operator! Check out our latest blog post for real-life applications and insights. #SQLTip #ClickHouse #ConditionalAnalysis #DataInsights #DataScience zurl.co/kmjE

#SQLTip: Join tables with the same criteria and same column names to speed up your operations. #coding #programming #databases

#SQLTip: Always include an ORDER BY clause in combination with TOP n to ensure predictable sorting. #Programming #Database #QueryTips

#SQLTip: Having trouble writing complex queries? Try breaking them down into simpler subqueries & joining together the results. It makes troubleshooting & optimization easier! #programming

#SQLTip: If you need to quickly compare 2 tables, try using `SELECT * FROM [table1] EXCEPT SELECT * FROM [table2]` to find the differences quickly. #programming #sql

#SQLTip: Use the JOIN statement to combine data from multiple tables with related fields and create a single outcome. #Programming #Database

#SQLTip: Keep your queries simple - try breaking a query into multiple, simpler ones for better performance and readability. #Programming #SQL

#SQLTip: To improve query performance, always use the appropriate data types. Avoid using the 'text' data type to store numbers & dates. #DBA #Programming

#SQLTip: Don't forget to use "SET NOCOUNT ON;" to prevent message boxes that contain the number of rows affected by the query from displaying. #programming #databases

#SQLTip: Always normalize your database structure for best performance and scalability. Break up data into smaller tables and use foreign keys for relationships. #programming #databases

#SQLTip: Use SELECT * sparingly. Not only is it inefficient, but it increases the chances of unnecessary data being fetched & causing potential performance issue. #Programming #Database

My SQL ran fine. I could read it. But was it readable to anyone else? Nah. Until I found that little 🧹 icon in MySQL. Hover: “Beautify or Reformat the SQL Script.” It's like 1,000 angels singing in indentation. #SQLTip #DataHumor #MySQL