Descrição
Descrição:
I created this course to help freshers start day career as Oracle DBA. SQL and Unix is really important to start career as Oracle DBA.
In this course I have explain about the basic concept of SQL. this course will help you to get the knowledge about structured query language.
whenever you go for an interview as a fresher Oracle DBA there is a chances that interviewer can expect that you have a knowledge about SQL.
What is SQL?
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SQL stands for Structured Query Language
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SQL lets you access and manipulate databases
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SQL became a standard of the American National Standards Institute (ANSI) in 1986, and of the International Organization for Standardization (ISO) in 1987
What Can SQL do?
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SQL can execute queries against a database
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SQL can retrieve data from a database
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SQL can insert records in a database
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SQL can update records in a database
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SQL can delete records from a database
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SQL can create new databases
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SQL can create new tables in a database
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SQL can create stored procedures in a database
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SQL can create views in a database
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SQL can set permissions on tables, procedures, and views
RDBMS
RDBMS stands for Relational Database Management System.
RDBMS is the basis for SQL, and for all modern database systems such as MS SQL Server, IBM DB2, Oracle, MySQL, and Microsoft Access.
The data in RDBMS is stored in database objects called tables. A table is a collection of related data entries and it consists of columns and rows.
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