SQL in Guduvancheri
Learn SQL in Guduvancheri at Prince Infotech
SQL (Structured Query Language) is a domain-specific language used in programming and designed for managing data held in a relational database management system(RDBMS), or for stream processing in a relational data stream management system (RDSMS). It is particularly useful in handling structured data where there are relations between different entities/variables of the data. SQL offers two main advantages over older read/write APIs like ISAM or VSAM: first, it introduced the concept of accessing many records with one single command; and second, it eliminates the need to specify how to reach a record, e.g. with or without an index.
Originally based upon relational algebra and tuple relational calculus, SQL consists of many types of statements,which may be informally classed as sub languages, commonly: a data query language (DQL),a data definition language(DDL). a data control language (DCL), and a data manipulation language (DML). The scope of SQL includes data query, data manipulation (insert, update and delete), data definition (schema creation and modification), and data access control. Although SQL is often described as, and to a great extent is, a declarative language (4GL), it also includes procedural elements.
Introdution to sql – data types – constraints – primary key – foreign key – DQL – functions ( single row, multi row ) – sub query(simple sub query,correlated sub query) – joins (oracle porpriatory,ansi joins) –DDL (create table, alter ,rename, drop ,truncate) – DML ( insert , update , delete ) – DCL (grant , revoke) – DTL ( commit, rollback , save point).
Introduction to pl/sql – pl/sql basics – data types – variables – control structure(if , if else, nested if, for, while, do while) – anchor data types – sub types – array – normal form – views – index –stored procedure –cursor concepts ( implicit , explicit ) –cursor with cursor for loop – exception handling – functions – triggers.