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Topics include constraints and data integrity, query types (SELECT, INSERT, UPDATE, DELETE), joins (cross join, self join, inner/left/right/full), indexing strategies (clustered, non-clustered, unique, composite), pattern matching with LIKE and wildcards, and table creation techniques. It also covers stored procedures, collation and sensitivity, OLTP vs OLAP, user-defined functions, foreign keys, and subqueries.",{"@graph":69,"@context":123},[70,84,106],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":20,"@type":76,"position":81},"https://docshare.wps.com/document/exam/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/top-accenture-sql-interview-questions-and-answers-read-online-free/391529/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/top-accenture-sql-interview-questions-and-answers-read-online-free/391529.png","ImageObject",300,407,{"name":92,"@type":93},"Ivy","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-11-09","2026-09-25",true,{"@type":102,"interactionType":103,"userInteractionCount":105},"InteractionCounter",{"@type":104},"ViewAction",13,{"@type":107,"mainEntity":108},"FAQPage",[109,115,119],{"name":110,"@type":111,"acceptedAnswer":112},"What is a UNIQUE constraint and what is it used for?","Question",{"text":113,"@type":114},"A UNIQUE constraint ensures all values in a column (or set of columns) are unique. It helps prevent duplicate entries in the specified column(s).","Answer",{"name":116,"@type":111,"acceptedAnswer":117},"What is the difference between a clustered and a non-clustered index?",{"text":118,"@type":114},"A clustered index sorts and stores table rows based on the index key, and only one clustered index can exist per table. A non-clustered index uses a separate structure for index keys and pointers and can be multiple per table without changing the physical row order.",{"name":120,"@type":111,"acceptedAnswer":121},"What is OLTP and how does it differ from OLAP?",{"text":122,"@type":114},"OLTP (Online Transaction Processing) supports day-to-day transaction operations with fast query processing and high transaction volume. OLAP (Online Analytical Processing) is optimized for complex, read-heavy queries and analysis, supporting multidimensional operations and often denormalized data.","https://schema.org",{"og:url":83,"og:type":125,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":127,"canonical":83},"index,follow",{"doc_id":129,"site_id":62},391529,1790412583,{"code":4,"msg":5,"data":132},{"doc_id":129,"user_id":133,"nickname":92,"user_avatar":134,"doc_module":4,"category_id":19,"category_name":20,"doc_title":65,"doc_description":67,"doc_content":135,"file_id":136,"file_url":137,"file_type":138,"file_size":139,"view_count":105,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":29,"language":140,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":141,"faqs":142,"seo_title":143,"seo_description":67,"update_tm":144,"read_time":145,"preview_page_count":4},549758252649,"https://ap-avatar.wpscdn.com/avatar/8000253669c5317157?_k=1778319167496531819","Top Accenture SQL Interview Questions and Answers What is a UNIQUE constraint?  \n• Definition: A constraint that ensures all values in a column or a set of columns are unique.  \n• Purpose: Prevents duplicate entries in the specified column(s) .  \n• Example: ALTER TABLE table_name ADD CONSTRAINT unique_constraint UNIQUE (column_name);  \nWhat is a Query?  \n• Definition: A request for data or information from a database.  \n• Types:  \no SELECT: Retrieves data from a database.  \no INSERT: Adds new data.  \no UPDATE: Modifies existing data.  \no DELETE: Removes data.  \nWhat is Data Integrity?  \n• Definition: The accuracy and consistency of data within a database.  \n• Types:  \no Entity Integrity: Ensures each row is uniquely identifiable.  \no Referential Integrity: Ensures relationships between tables remain consistent.  \no Domain Integrity: Ensures data values are within a specific range or format. What is the difference between Clustered and Non-clustered index?  \n• Clustered Index:  \no Definition: Sorts and stores data rows in the table based on the index key.  \no Characteristics: Only one clustered index per table; affects physical order of rows.  \n• Non-clustered Index:  \no Definition: Creates a separate structure from the data rows to store index keys and pointers.  \no Characteristics: Multiple non-clustered indexes can exist on a table; does not affect physical order of rows.  \nWhat is an Index? Explain its different types.  \n• Definition: A database object that improves query performance by allowing faster data retrieval.  \n• Types:  \no Clustered Index: Defines the physical order of data in a table.  \no Non-clustered Index: Creates a logical order of data without changing the physical order.  \no Unique Index: Ensures all values in the index are unique.  \no Composite Index: Indexes multiple columns to improve performance on queries involving those columns.  \nWhat is a Cross-Join?  \n• Definition: A type of join that returns the Cartesian product of two tables.  \n• Characteristics: Combines every row from the first table with every row from the second table.  \n• Example: SELECT * FROM table1 CROSS JOIN table2; What is a Self-Join?  \n• Definition: A join where a table is joined with itself.  \n• Purpose: Useful for comparing rows within the same table.  \n• Example: SELECT A. *, B. * FROM employees A JOIN employees B ON A. manager_id = B.employee_id;  \nWhat is a Join? List its different types.  \n• Definition: A SQL operation that combines rows from two or more tables based on a related column.  \n• Types:  \no INNER JOIN: Returns rows with matching values in both tables.  \no LEFT JOIN (or LEFT OUTER JOIN): Returns all rows from the left table and matched rows from the right table.  \no RIGHT JOIN (or RIGHT OUTER JOIN): Returns all rows from the right table and matched rows from the left table.  \no FULL JOIN (or FULL OUTER JOIN): Returns rows with a match in one of the tables. What is Pattern Matching in SQL?  \n• Definition: Pattern matching is used to search for specific patterns within column data.  \n• Key Operators:  \no LIKE: Searches for a specified pattern in a column.  \no %: Represents zero or more characters in a pattern.  \no _: Represents a single character in a pattern.  \nHow to create empty tables with the same structure as another table?  \n• Using CREATE TABLE AS SELECT  \nCREATE TABLE new_table AS SELECT * FROM existing_table WHERE 1=0;  \n• Using CREATE TABLE with LIKE: CREATE TABLE new_table LIKE existing_table;  \nWhat is a Recursive Stored Procedure?  \n• Definition: A stored procedure that calls itself to perform repetitive tasks.  \n• Usage: Useful for tasks like traversing hierarchical data (e.g., organizational charts) . What is a Stored Procedure?  \n• Definition: A precompiled SQL statement or set of statements stored in the database.  \n• Benefits: Can be executed repeatedly, improves performance, and provides modular code. What is Collation? What are the different types of Collation Sensitivity?  \n• Definition: Collation","cbCaipuJktjhhOMA","https://ap.wps.com/l/cbCaipuJktjhhOMA","pdf",171086,"English","# Interview Questions\n## SQL Fundamentals\n## Constraints, Integrity, and Keys\n## Joins and Query Patterns\n## Indexes and Collation\n## Stored Procedures, Functions, and Analytics\n## OLTP vs OLAP","[{\"question\":\"What is a UNIQUE constraint and what is it used for?\",\"answer\":\"A UNIQUE constraint ensures all values in a column (or set of columns) are unique. It helps prevent duplicate entries in the specified column(s).\"},{\"question\":\"What is the difference between a clustered and a non-clustered index?\",\"answer\":\"A clustered index sorts and stores table rows based on the index key, and only one clustered index can exist per table. A non-clustered index uses a separate structure for index keys and pointers and can be multiple per table without changing the physical row order.\"},{\"question\":\"What is OLTP and how does it differ from OLAP?\",\"answer\":\"OLTP (Online Transaction Processing) supports day-to-day transaction operations with fast query processing and high transaction volume. OLAP (Online Analytical Processing) is optimized for complex, read-heavy queries and analysis, supporting multidimensional operations and often denormalized data.\"}]","Top Accenture SQL Interview Questions and Answers - read online free | PDF",1790353902,15]