Cookbook

MySQL

How to Add Days to a Date in MySQL

SQL Server

How to Add Days to a Date in T-SQL

Standard SQL PostgreSQL Oracle SQL Server MySQL SQLite

How to Add Ranking Positions of Rows in SQL with RANK()

Standard SQL PostgreSQL Oracle SQL Server MySQL SQLite

How to Add Ranking Positions to Rows with DENSE_RANK() in SQL

MySQL

How to Add Time to a Datetime Value in MySQL

Standard SQL MySQL PostgreSQL SQL Server Oracle

How to Add a Column in SQL

SQLite

How to Add a Month to a Date in SQLite

MySQL

How to Avoid Dividing by Zero in MySQL

MySQL Oracle SQL Server PostgreSQL

How to Calculate a Square Root in SQL

MySQL Oracle SQL Server PostgreSQL

How to Calculate a Square in SQL

SQL Server

How to Extract or Convert Time Data from a String in SQL Server

PostgreSQL

How to Extract the Week Number from a Date in PostgreSQL

Standard SQL PostgreSQL MS SQL Server Oracle MySQL SQLite

How to Filter Records with Aggregate Function AVG

Standard SQL PostgreSQL MS SQL Server Oracle MySQL SQLite

How to Filter Records with Aggregate Function COUNT

Standard SQL PostgreSQL MS SQL Server Oracle MySQL SQLite

How to Filter Records with Aggregate Function SUM

Standard SQL MySQL PostgreSQL Oracle MS SQL Server SQLite

How to Filter Rows without NULL in a column

Standard SQL MySQL MS SQL Server PostgreSQL Oracle SQLite

How to Find Duplicate Rows in SQL?

Standard SQL PostgreSQL MS SQL Server Oracle MySQL SQLite

How to Find Maximum Values in Rows

Standard SQL PostgreSQL MS SQL Server Oracle MySQL SQLite

How to Find Minimum Values in Columns

Standard SQL MySQL PostgreSQL Oracle MS SQL Server SQLite

How to Find Records with NULL in a Column

MySQL

How to Get the Year and the Month From a Date in MySQL

SQL Server

How to Get the Year from a Date in T-SQL

MySQL

How to Get the Year from a Datetime Column in MySQL

PostgreSQL

How to Group by Month in PostgreSQL

T-SQL MySQL PostgreSQL Oracle SQLite

How to Group by Two Columns in SQL

MySQL Oracle PostgreSQL

How to Group by Year in SQL

T-SQL

How to Group by Year in T-SQL

Standard SQL PostgreSQL MS SQL Server Oracle

How to Handle Divide by Zero In SQL

Standard SQL MySQL MS SQL Server PostgreSQL Oracle SQLite

How to Join Multiple (3+) Tables in One Statement

Standard SQL MySQL MS SQL Server PostgreSQL Oracle SQLite

How to Join on Multiple Columns

MySQL Oracle MS SQL PostgreSQL

How to Use DISTINCT in SQL

Standard SQL PostgreSQL Oracle SQL Server MySQL SQLite

How to Use LIKE in SQL

Standard SQL PostgreSQL Oracle MySQL SQL Server

How to make a column unique in SQL?

Standard SQL PostgreSQL MS SQL Server Oracle MySQL SQLite

How to not Show Duplicates in SQL

Standard SQL PostgreSQL Oracle SQL Server

How to remove a unique constraint in SQL?

MS SQL Server

How to remove leading and/or trailing spaces of a string in T-SQL

PostgreSQL SQL Server MySQL SQLite

The Remainder in PostgreSQL, MS SQL Server, MySQL, and SQLite

MySQL

What Is the Default Constraint Name in MySQL?

Oracle

What Is the Default Constraint Name in Oracle?

PostgreSQL

What Is the Default Constraint Name in PostgreSQL?

How to Add Days to a Date in MySQL

How to Add Days to a Date in T-SQL

How to Add Ranking Positions of Rows in SQL with RANK()

How to Add Ranking Positions to Rows with DENSE_RANK() in SQL

How to Add Time to a Datetime Value in MySQL

How to Add a Column in SQL

How to Add a Month to a Date in SQLite

How to Avoid Dividing by Zero in MySQL

How to Calculate a Square Root in SQL

How to Calculate a Square in SQL

How to Calculate a Square in SQL Server

How to Calculate the Difference Between Two Dates in MySQL

How to Calculate the Difference Between Two Dates in PostgreSQL/Oracle

How to Calculate the Difference Between Two Dates in SQLite

How to Calculate the Difference Between Two Dates in T-SQL

How to Calculate the Difference Between Two Datetimes in T-SQL

How to Calculate the Difference Between Two Timestamps in MySQL

How to Calculate the Difference Between Two Timestamps in Oracle

How to Calculate the Difference Between Two Timestamps in PostgreSQL

How to Calculate the Difference Between Two Timestamps in SQLite

How to Capitalize the First Letter of Every Word in PostgreSQL

How to Change Date and Time Formats in T-SQL

How to Change Datetime Formats in MySQL

How to Change Seconds to a Time Value in MySQL

How to Change Text to Lowercase in SQL

How to Combine the Results of Two Queries in SQL

How to Comment in SQL

How to Compute an Absolute Value in SQL

How to Concatenate String and NULL Values in SQL Server

How to Concatenate Strings in SQL

How to Convert a String to Lowercase in SQL

How to Convert a String to Uppercase in SQL

How to Convert a String to a Date in PostgreSQL

How to Convert a String to a Numeric Value in PostgreSQL

How to Convert a String to a Timestamp in PostgreSQL

How to Convert an Integer to a Decimal in SQL Server

How to Count Distinct Values in SQL

How to Count the Number of Rows in a Table in SQL

How to Create One Table From Another Table in SQL

How to Create View in SQL

How to Create a Primary Key in SQL

How to Create a Table from an SQL Query

How to Create a Table with a Foreign Key in SQL

How to Delete a Foreign Key Constraint in SQL

How to Delete a Row in SQL

How to Eliminate Duplicate Rows in SQL

How to Extract a Substring From a String in Oracle/SQLite

How to Extract a Substring From a String in PostgreSQL/MySQL

How to Extract a Substring From a String in T-SQL

How to Extract a Substring in MySQL

How to Extract or Convert Time Data from a String in SQL Server

How to Extract the Week Number from a Date in PostgreSQL

How to Filter Records with Aggregate Function AVG

How to Filter Records with Aggregate Function COUNT

How to Filter Records with Aggregate Function SUM

How to Filter Rows without NULL in a column

How to Find Duplicate Rows in SQL?

How to Find Maximum Values in Rows

How to Find Minimum Values in Columns

How to Find Records with NULL in a Column

How to Find the Average of a Numeric Column in SQL

How to Find the Interval Between Two Dates in PostgreSQL

How to Find the Last Day of the Month for a Given Date in MySQL

How to Find the Maximum Value of a Numeric Column in SQL

How to Find the Minimum Value of a Column in SQL

How to Find the Name of a Constraint in MySQL

How to Find the Name of a Constraint in Oracle

How to Find the Name of a Constraint in PostgreSQL

How to Find the Name of a Constraint in SQL Server

How to Find the Number of Days Between Two Dates in MySQL

How to Floor Numbers in SQL

How to Format a Date in T-SQL

How to Format a Datetime in SQLite

How to Get Yesterday’s Date in MySQL

How to Get Yesterday’s Date in Oracle

How to Get Yesterday’s Date in PostgreSQL

How to Get Yesterday’s Date in SQLite

How to Get Yesterday’s Date in T-SQL

How to Get a Remainder Using MOD() in PostgreSQL, MS SQL Server, and MySQL

How to Get all Possible Combinations of Rows From two Tables in SQL