
SQL Joins: INNER JOIN, LEFT JOIN, and RIGHT JOIN
SQL joins: INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL JOIN
SQL joins: INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL JOIN
From Basics to Advanced: SQL Commands for Every Skill Level SQL (Structured Query Language) manages and manipulates relational databases. Whether you…
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Creating and Managing Database Connections with DBeaver
1. SQL Database Creation You have defined SQL queries to create three tables: country_state_city , data_counrty , and tbl_country , which are used …
MySQL Views: Create, Join & Drop with Examples A View in MySQL is a virtual table based on the result of a SQL query. It does not store data …
In SQL Server , the timestamp (or rowversion ) column is not a datetime value. It is a binary value used for versioning rows. If you need to conv…
Understanding SQL Primary Key In SQL, a Primary Key is a constraint that uniquely identifies each record in a table. It ensures that no two rows in …
SQL CHECK Constraint The CHECK constraint in SQL is used to enforce specific rules for the values that a column can hold. It ensures that all rows i…
SQL NOT NULL Constraint The NOT NULL constraint in SQL ensures that a column cannot have a NULL value. It enforces that every row must have a value…
SQL UNIQUE Constraint The UNIQUE constraint in SQL ensures that all the values in a specified column or a combination of columns are distinct. It pr…
SQL FOREIGN KEY Constraint A FOREIGN KEY is a column (or a set of columns) in one table that refers to the PRIMARY KEY in another table. It creates…
Understanding SQL ALTER TABLE The SQL ALTER TABLE statement is used to modify the structure of an existing table. It allows you to add, delete, or c…
SQL DROP TABLE The DROP TABLE statement in SQL is used to delete an entire table from the database. This operation removes both the table structure …