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A Practical Introduction to SQL: DDL, DML, and Data Analysis

DEV Community·Bill Muli·18 days ago
#WYpgQYyA
#beginners#database#sql#tutorial#used#create
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What are DDL and DML? DDL (Data Definition Language) DDL refers to SQL commands used to define and manage the structure of a database. These commands control how data is stored. Examples: 1.CREATE – used to create tables or databases 2.ALTER – used to modify existing structures 3.DROP – used to delete tables or databases Table structure after executing CREATE statement. DML (Data Manipulation Language) DML deals with the data inside the database. It allows you to insert, update, retrieve, and delete data. Examples: 1.INSERT – adds new records 2.UPDATE – modifies existing records 3.DELETE – removes records 4.SELECT – retrieves data Difference DDL focuses on the structure , while DML focuses on the data itself .…

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