Sql create table statement
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The SQL CREATE TABLE statement is used to create tables to store data. It allows defining integrity constraints like primary keys, unique keys, and foreign keys at the column or table level. The syntax of the CREATE statement differs across relational database management systems. For example, to create an "employee" table with columns for ID, name, department, age, salary, and location, specifying the data types for each column.
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C programming session 10Vivek Singh This document provides practice problems for Chapters 4 and 5 of a Programming in C session. Chapter 4 problems involve modifying string programs to take user input and compare string length and equality. Chapter 5 problems involve modifying a data analysis program to display sales data in different formats (%s, %p, %i) based on user run commands, with help messages for invalid commands. Functions for the required calculations are stored in a separate func.c file.
C programming session 08
C programming session 08Vivek Singh This document provides an overview of programming in C and functions. It discusses implementing modular approaches using functions, parameters and return values of functions, passing arrays and command line arguments to functions, and using library functions for string manipulation and converting data types. Examples and practice problems are provided relating to defining and calling functions, passing arguments by value and reference, and using standard string and numeric conversion functions. The overall aim is to teach how to work with functions and data types in C programming.
C programming session 07
C programming session 07Vivek Singh This document provides an overview of pointers in C programming. It discusses declaring and initializing pointers, manipulating pointers using operators like asterisk and ampersand, pointer arithmetic, and using pointers to manipulate character arrays and two-dimensional arrays. Examples are provided to demonstrate declaring pointers, accessing values using pointers, incrementing pointers, and printing strings using pointers to a character array. The document also clarifies the difference between static and dynamic pointers.
C programming session 05
C programming session 05Vivek Singh This document discusses arrays in C programming. It covers one-dimensional and multi-dimensional arrays, including how to declare, initialize, and access array elements using subscripts. Preprocessor directives are also introduced, with #define explained as a way to define macros that substitute identifier names with values. The objectives are to learn about arrays and preprocessor directives in C.
C programming session 04
C programming session 04Vivek Singh This document outlines practice problems from chapters 1 and 2 of a programming in C course. Chapter 1 problems involve writing functions to display a character or string a specified number of times. Chapter 2 problems include using for loops to print patterns, calculating triangular numbers from user input, and determining if a number is even or odd. The overall objective is for students to practice concepts from the first two chapters.
C programming session 02
C programming session 02Vivek Singh This document provides an overview of operators, loops, and input/output functions in the C programming language. It begins by explaining different types of operators in C like relational, logical, unary, binary, ternary, and increment/decrement operators. Examples of using logical, unary, binary, and ternary operators are given. The document then discusses loops in C, specifically for loops. It provides examples of using loops to accept input until a certain condition is met. The key topics covered in 3 sentences or less are: types of operators in C, examples of using various operators, an overview of loops in C including for loops, and examples of using loops to accept input until a condition is met.
C programming session 01
C programming session 01Vivek Singh This document provides an overview of programming in C language. It discusses the benefits and features of C, data types in C including fundamental and derived types, functions and their structure, input-output functions, and control structures like conditional statements (if-else, switch-case) and loops (while, do-while). Examples are given for defining variables, writing functions, accepting user input, and using control structures. Practice problems are included to write functions demonstrating various C concepts.
C programming session 16
C programming session 16Vivek Singh This 3 slide document outlines practice questions from Chapters 7 and 8 of a Programming in C session. Slide 1 introduces that practice questions from the two chapters will be covered. Slide 2 contains a single practice question asking the reader to write a program to display the structure of a database file. Slide 3 lists two additional practice questions: the first asks the reader to read and print a file after the first 10 characters, while the second instructs them to write their name 10 characters from the end of the file and use the exit() function if unable to write or open the file.
Niit aptitude question paper
Niit aptitude question paperVivek Singh The passage criticizes arguments that attempt to distinguish social sciences from physical sciences methodologically. It argues that examples claiming greater difficulties formulating theories in social sciences do not relate to how such theories are verified. The author believes theories in social sciences are appropriately substantiated using the same experiments as physical sciences, distinguishing them technically but not theoretically. The Martian argument that social behaviors cannot be understood without social context is also criticized.
Excel shortcut and tips
Excel shortcut and tipsVivek Singh This document provides shortcuts for navigating and editing Excel. It includes shortcuts for entering and editing cell data, working with formulas, formatting cells, selecting ranges, moving within sheets, printing, using AutoFilter, and working with PivotTables. Shortcuts are provided for common tasks like copying/pasting, undoing actions, navigating sheets, and more. Menus and toolbars can also be accessed using keyboard shortcuts.
Sql where clause
Sql where clauseVivek Singh The WHERE clause is used to filter rows retrieved from a table and return only rows that meet specific conditions. The condition in the WHERE clause uses comparison operators to compare column values to literals or other column values. Expressions can also be used in the WHERE clause. Examples demonstrate retrieving a student's name by ID and calculating a salary increase over a threshold.
Sql tutorial, tutorials sql
Sql tutorial, tutorials sqlVivek Singh This tutorial teaches the basics of SQL and how to write SQL queries. SQL (Structured Query Language) is used to modify and access data from a database. It was first developed by IBM in the 1970s and has become a standard language used by most relational database management systems like Oracle, Microsoft SQL Server, and Sybase. Some common SQL commands include SELECT, UPDATE, INSERT, DELETE, WHERE, and ORDER BY clauses.
Sql subquery
Sql subqueryVivek Singh A subquery, or nested query, allows a query to be run within another SQL statement. Subqueries return intermediate results that can be used by the outer query. They are useful when the exact value needed is unknown but can be determined by a separate SELECT statement. Subqueries can be used with SELECT, INSERT, UPDATE, and DELETE statements. Correlated subqueries depend on the outer query, while non-correlated subqueries operate independently.
Sql select statement
Sql select statementVivek Singh The SQL SELECT statement is used to query and retrieve data from database tables. It must specify the column names and table to retrieve data from. Optional clauses like WHERE, GROUP BY, HAVING, and ORDER BY can further filter the retrieved data. Expressions combining columns with operators can be used in the SELECT statement to derive new values from the column data.
Sql rename
Sql renameVivek Singh The document discusses the SQL RENAME statement, which allows renaming a table in some database management systems. It provides the syntax for renaming a table using RENAME TABLE in standard SQL and ALTER TABLE in Oracle. An example demonstrates renaming the "employees" table to "employees_new" and verifies that the data is retained in the new table name.
Sql query tuning or query optimization
Sql query tuning or query optimizationVivek Singh This document provides tips for optimizing SQL queries to improve performance. Some key recommendations include:
1) Select only necessary columns instead of using SELECT * to reduce overhead
2) Use EXISTS, IN, and joins appropriately depending on where filter criteria is specified
3) Minimize subqueries and try to rewrite queries using joins when possible
4) Be cautious of conditions in the WHERE clause to ensure optimal execution order
Sql query tips or query optimization
Sql query tips or query optimizationVivek Singh Here are some tips for optimizing SQL queries:
1) Only select the necessary columns and rows to minimize data retrieval and transfer.
2) Prune select lists to only include columns that are truly necessary based on query predicates.
3) When creating new tables, include a unique clustered index on a numeric column to improve performance of joins and queries.
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