Free Udemy Course: Learn SQL from basics to Advanced and become a pro in mysql

Why SQLStore large number of recordsShare huge data set among many peopleAdd and edit data easilyQuick and easy to find informationRDBMS TERMINOLOGYColumn   as Attribute  Row as Entity InstanceTable as EntityAlternateKey as UniqueKeyRELATIONSHIPS Cardinality90% of the tables in database will be linked with another tables.10%of the tables will be independent.There are three types of relationships between tablesone to oneone to manymany to manyTables can have a single / multiple relationships or may not have relationships.Structured data - 2 dimensional data Rows,ColumnsPrimaryKey in one table will be given as ForiegnKey in another table to build relationship.DATA MODELINGRDBMSPrimaryKey & ForiegnKey with relationship between them.1 to 1 - any PrimaryKey can become ForiegnKey1 to many employees in a departmentPK of parent table will be FK in child tableDepartment table Deptid(PK),DeptName,Employees Table  Empid,EmpName,DeptId(FK)many to many(students and teachers,patients & doctors,Hospital & Doctors)(TeacherId,TeacherName)(StudentId,StudentName,TeacherId)New table will be created and extra column will be added(Bridge Table)Patient Table(PatientNo(PK),PatientName,Adress),Doctors Table(DoctorNo(PK),Name,Qualification,Salary, DateOfJoining, DateOfResigning)Patient Doctor Table()SDLC-Software Development Life CycleRequirement Analysis & Design Development Testing ReleaseDomain expert(SRS documentation) Architect SQL developers Testers Deployers(TL/Manager)ERD(Entity Relationship Diagram)Peter Chan-Used to design DatabaseReferential Integrity SQL server performs existence check when we create relationship.SELF REFERENTIAL TABLESA table which has both PrimaryKey and ForiegnKey in it & ForiegnKey refering the primary key in the same table.You are going to learn commands (DDL,DML,DQL,DCL,TCL)datatypes constraints CONSTRAINSNull  DefaultPrimaryKey UniqueKeyForiegnKeyCheckAuto Incrementviewsoperatorsquery writingjoinssub queryderived tableViews IndexesStored ProceduresTriggers FunctionsCursors