Prerequisite – DDL, DQL, DML, DCL and TCL Commands
DDL is Data Definition Language which is used to define data structures. For example: create table, alter table are instructions in SQL.
DML is Data Manipulation Language which is used to manipulate data itself. For example: insert, update, delete are instructions in SQL.
Difference between DDL and DML:
|It stands for Data Definition Language.||It stands for Data Manipulation Language.|
|It is used to create database schema and can be used to define some constraints as well.||It is used to add, retrieve or update the data.|
|It basically defines the column (Attributes) of the table.||It add or update the row of the table. These rows are called as tuple.|
|It doesn’t have any further classification.||It is further classified into Procedural and Non-Procedural DML.|
|Basic command present in DDL are CREATE, DROP, RENAME, ALTER etc.||BASIC command present in DML are UPDATE, INSERT, MERGE etc.|
- Difference between RDBMS and DBMS
- Difference between OLAP and OLTP in DBMS
- Main difference between Timestamp protocol and Thomos write rule in DBMS
- Difference between Row oriented and Column oriented data stores in DBMS
- Need for DBMS
- Starvation in DBMS
- Disadvantages of DBMS
- Deadlock in DBMS
- Interfaces in DBMS
- DBMS | SQL | Question 1
- Cascadeless in DBMS
- DBMS | SQL | Question 2
- Recoverability in DBMS
- Categories of End Users in DBMS
- Why recovery is needed in DBMS
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Improved By : aman neekhara