[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-0-en-105":3,"doc-seo-497965-105":59,"doc-detail-497965-en":130},{"code":4,"msg":5,"data":6},0,"success",[7,13,18,23,28,33,38,43,48,51,55],{"id":8,"doc_module":4,"doc_module_name":9,"category_name":10,"show_sort_weight":11,"slug":12},1,"Document","Story & Novel",90,"story-novel",{"id":14,"doc_module":4,"doc_module_name":9,"category_name":15,"show_sort_weight":16,"slug":17},2,"Literature",80,"literature",{"id":19,"doc_module":4,"doc_module_name":9,"category_name":20,"show_sort_weight":21,"slug":22},4,"Exam",70,"exam",{"id":24,"doc_module":4,"doc_module_name":9,"category_name":25,"show_sort_weight":26,"slug":27},5,"Comic",60,"comic",{"id":29,"doc_module":4,"doc_module_name":9,"category_name":30,"show_sort_weight":31,"slug":32},6,"Technology",50,"technology",{"id":34,"doc_module":4,"doc_module_name":9,"category_name":35,"show_sort_weight":36,"slug":37},7,"Healthcare",40,"healthcare",{"id":39,"doc_module":4,"doc_module_name":9,"category_name":40,"show_sort_weight":41,"slug":42},8,"Research & Report",30,"research-report",{"id":44,"doc_module":4,"doc_module_name":9,"category_name":45,"show_sort_weight":46,"slug":47},9,"Religion & Spirituality",20,"religion-spirituality",{"id":46,"doc_module":4,"doc_module_name":9,"category_name":49,"show_sort_weight":46,"slug":50},"World Cup","world-cup",{"id":52,"doc_module":4,"doc_module_name":9,"category_name":53,"show_sort_weight":52,"slug":54},10,"Lifestyle","lifestyle",{"id":56,"doc_module":4,"doc_module_name":9,"category_name":57,"show_sort_weight":24,"slug":58},19,"General","general",{"code":4,"msg":60,"data":61},"ok",{"site_id":62,"language":63,"slug":64,"title":65,"keywords":66,"description":67,"schema_data":68,"social_meta":123,"head_meta":125,"extra_data":127,"updated_unix":129},105,"en","test-of-basic-knowledge-of-sql-sql-practice-test-questions-and-answer-key","Test of Basic Knowledge of SQL - SQL practice test questions and answer key","","SQL basics assessment test covering fundamental database and query skills required for the Deloitte Data Science Academy intermediate program. The test introduces a sample schema with Customers, Orders, Products, and OrderDetails, then asks multiple-choice questions on creating and dropping databases, defining relationships, specifying table structures, selecting primary keys, using foreign keys, inserting and updating records, and deleting orders. Additional items focus on constructing SELECT queries with distinct values and NULL checks, filtering by country and price, and combining conditions with supplier and category identifiers.",{"@graph":69,"@context":122},[70,84,105],{"@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/test-of-basic-knowledge-of-sql-sql-practice-test-questions-and-answer-key/497965/",{"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/test-of-basic-knowledge-of-sql-sql-practice-test-questions-and-answer-key/497965.png","ImageObject",300,407,{"name":92,"@type":93},"Emma Wilson","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-31","2026-10-02",true,{"@type":102,"interactionType":103,"userInteractionCount":29},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"What SQL concepts does this test assess?","Question",{"text":112,"@type":113},"It assesses core SQL concepts including creating and dropping databases, defining relationships and constraints, inserting, updating, deleting, and writing SELECT queries with filters, DISTINCT, and NULL handling.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"What tables are used as the basis for the questions?",{"text":117,"@type":113},"The test assumes the availability of Customers, Orders, Products, and OrderDetails tables from a Test database.",{"name":119,"@type":110,"acceptedAnswer":120},"How are answers verified and what happens if the score is low?",{"text":121,"@type":113},"Use the answer key at the end of the document to verify correctness. If the success rate is below 75% (fewer than 30 correct answers out of 40), consult online resources to deepen familiarity with SQL.","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},497965,1792142283,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":19,"category_name":20,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":29,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":139,"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},3848291630094,"https://eur-avatar.wpscdn.com/davatar_085a072bc5b1113ac321206ff7593b45","Test of Basic Knowledge of SQL  \nUsing this test you can assess whether you have basic working knowledge of SQL that is prerequisite for attending Deloitte’s Data Science Academy – Intermediate program . To verify accuracy of your answers, use the key with correct answers at the end of this document. In case that your success rate will be lower than 75%(i.e ., you will answer correctly less than 30 questions out of 40), you should consider consulting available on-line resources that will enable you to become more deeply familiarized with SQL. For that purpose, we have provided you for each question with a link that will bring you to the website that will help you to grasp and practice given SQL concept.  \nThere is no strict time limit for finishing the test, but we suppose that you will be able to finish it in ~20 minutes. Some of the questions within the test assume that following Customers, Orders, Products and OrderDetails tables from the Test database are available to you.  \nCustomers table:  \nCustomerID CustomerName ContactName Address City PostalCode Country  \n 1 Mary A Mary Austin 338 City Road London EC1V 2NX UK   \n2 KJ Karl Jung Graefestr. 2 Berlin 10967 Germany  \n3 Jamie_Wats James Watson 3116 Massachusetts Avenue Washington 20004 USA   \n… … … … … … …  \nOrders table:  \nOrderID CustomerID OrderDate  \n10308 5 2017-01-21  \n10309 80 2017-01-22  \n10310 97 2017-01-22  \n… … …  \nProducts table:  \nProductID ProductName SupplierID CategoryID Unit Price  \n1 Lip Gloss 1 1 2 bottles 20  \n2 Eyeshadow makeup 1 2 1 box 10  \n3 Lip Balm 2 1 1 bottle 5   \n… … … … … …  \nOrderDetails table:  \nOrderDetailID OrderID ProductID Quantity  \n 1 12508 5 1   \n2 12508 6 10  \n3 12509 25 50   \n… … … …  \nQ1) What SQL statement would you use to create SQL database named Test?  \na) CREATE DBT Test;  \nb) CREATE Test;  \nc) CREATE DATABASE Test;  \nd) MAKE DATABASE Test;  \nQ2) What SQL statement would you use to remove SQL database named Test?  \na) DROP DATABASE Test;  \nb) REMOVE Test;  \nc) DROP DBT Test;  \nd) REMOVE DATABASE Test;  \nQ3) Assign individual relationships that one can find in ERD (Entity Relationship Diagram) to their appropriate descriptions.  \na)  \nb)  \nc)  \nd)  \ne)  \nf)  \ng)  \n1) zero or many (optional)  \n2) one or more (mandatory)  \n3) one to one  \n4) one and only one (mandatory)  \n5) one to many (mandatory)  \n6) many  \n7) zero or one (optional)  \nQ4) Which kind of relationship best describes relationship between Products (A) and OrderDetails (B) tables?  \nQ5) Fulfill missing parts in SQL statement below to create Products table.  \n  (  \nProductID INT   ,  \nProductName VARCHAR(255),  \nSupplierID INT,  \nCategoryID INT,  \nUnit   ,  \nPrice    \n);  \nQ6) Primary Key is a combination of two types of constraints. Find the correct one in the list below.  \na) UNIQUE & DEFAULT  \nb) CHECK & UNIQUE  \nc) UNIQUE & NOT NULL  \nd) CHECK & AUTO INCREMENT  \nQ7) Which field in the Orders table has a role of FOREIGN KEY in relation to Customers table?  \na) CustomerID  \nb) OrderID  \nc) OrderDate  \nd) CustomerName  \nQ8) What SQL statement would you use to put a new record into the Orders table?  \na) INSERT INTO Orders (OrderID, CustomerID, OrderDate) VALUES (200, 125, '2018-02-05');  \nb) PUT INTO Orders (OrderID, CustomerID, OrderDate) VALUES (200, 125, '2018-02-05');  \nc) INSERT VALUES (200, 125, '2018-02-05') INTO Orders (OrderID, CustomerID, OrderDate);  \nd) PUT VALUES (200, 125, '2018-02-05') INTO Orders (OrderID, CustomerID, OrderDate);  \nQ9) What SQL statement would you use to modify the existing record of CustomerID to 10 for OrderID \\#10308 in the Orders table?  \na) CHANGE SET Orders CustomerID = 10 WHERE OrderID = 10308;  \nb) UPDATE SET Orders CustomerID = 10 WHERE OrderID = 10308;  \nc) CHANGE Orders SET CustomerID = 10 WHERE OrderID = 10308;  \nd) UPDATE Orders SET CustomerID = 10 WHERE OrderID = 10308;  \nQ10) What SQL statement would you use to delete order with OrderID \\#10308 from the Orders table?  \na) DELETE FROM Orders WHERE OrderID = 10308 ;  \nb","cbCaijxT9ByvYVrh","https://ap.wps.com/l/cbCaijxT9ByvYVrh","pdf",271788,13,"English","# Test overview\n# Database schema\n## Customers table\n## Orders table\n## Products table\n## OrderDetails table\n# Questions\n## Data definition and constraints\n## Data manipulation (INSERT/UPDATE/DELETE)\n## Querying and filtering","[{\"question\":\"What SQL concepts does this test assess?\",\"answer\":\"It assesses core SQL concepts including creating and dropping databases, defining relationships and constraints, inserting, updating, deleting, and writing SELECT queries with filters, DISTINCT, and NULL handling.\"},{\"question\":\"What tables are used as the basis for the questions?\",\"answer\":\"The test assumes the availability of Customers, Orders, Products, and OrderDetails tables from a Test database.\"},{\"question\":\"How are answers verified and what happens if the score is low?\",\"answer\":\"Use the answer key at the end of the document to verify correctness. If the success rate is below 75% (fewer than 30 correct answers out of 40), consult online resources to deepen familiarity with SQL.\"}]","Test of Basic Knowledge of SQL - SQL practice test questions and answer key | PDF",1790972537,33]