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Database

251 questions

1Second Highest SalaryMedium
Database
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2Recyclable and Low Fat ProductsEasy
Database
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3Employees Earning More Than Their ManagersEasy
Database
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4Find Customer RefereeEasy
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5Replace Employee ID With The Unique IdentifierEasy
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6Game Play Analysis IEasy
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7Combine Two TablesEasy
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8Monthly Transactions IMedium
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9Movie RatingMedium
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10Count Salary CategoriesMedium
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11Combine Two TablesEasy
Database
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12Recyclable and Low Fat ProductsEasy
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13Second Highest SalaryMedium
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14Article Views IEasy
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15Employees Earning More Than Their ManagersEasy
Database
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16Rising TemperatureEasy
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17Big CountriesEasy
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18Customer Who Visited but Did Not Make Any TransactionsEasy
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19Game Play Analysis IEasy
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20Employee BonusEasy
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21Project Employees IEasy
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22Number of Unique Subjects Taught by Each TeacherEasy
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23Delete Duplicate EmailsEasy
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24Managers with at Least 5 Direct ReportsMedium
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25Restaurant GrowthMedium
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26Triangle JudgementEasy
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27Find Followers CountEasy
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28Replace Employee ID With The Unique IdentifierEasy
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29Find Customer RefereeEasy
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30Queries Quality and PercentageEasy
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31Product Sales Analysis IIIMedium
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32Monthly Transactions IMedium
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33Movie RatingMedium
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34Count Salary CategoriesMedium
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35Combine Two TablesEasy
Database
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36Recyclable and Low Fat ProductsEasy
Database
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37Employees Earning More Than Their ManagersEasy
Database
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38Second Highest SalaryMedium
Database
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39Article Views IEasy
Database
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40Rising TemperatureEasy
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41Big CountriesEasy
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42Customers Who Never OrderEasy
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43Employee BonusEasy
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44Replace Employee ID With The Unique IdentifierEasy
Database
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45Delete Duplicate EmailsEasy
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46Project Employees IEasy
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47Game Play Analysis IEasy
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48Managers with at Least 5 Direct ReportsMedium
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49Find Customer RefereeEasy
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50Monthly Transactions IMedium
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51Duplicate EmailsEasy
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52User Activity for the Past 30 Days IEasy
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53Number of Unique Subjects Taught by Each TeacherEasy
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54Customer Who Visited but Did Not Make Any TransactionsEasy
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55Average Time of Process per MachineEasy
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56Product Price at a Given DateMedium
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57Nth Highest SalaryMedium
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58Game Play Analysis IVMedium
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59Rank ScoresMedium
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60Not Boring MoviesEasy
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61Product Sales Analysis IIIMedium
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62Restaurant GrowthMedium
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63Investments in 2016Medium
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64Trips and UsersHard
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65Human Traffic of StadiumHard
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66Find COVID Recovery PatientsMedium
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67Classes With at Least 5 StudentsEasy
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68Reformat Department TableEasy
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69Market Analysis IMedium
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70Actors and Directors Who Cooperated At Least Three TimesEasy
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71Sales PersonEasy
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72Triangle JudgementEasy
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73Fix Names in a TableEasy
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74Find Followers CountEasy
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75Average Selling PriceEasy
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76Students and ExaminationsEasy
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77Queries Quality and PercentageEasy
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78Consecutive NumbersMedium
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79Group Sold Products By The DateEasy
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80Movie RatingMedium
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81Count Salary CategoriesMedium
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82Recyclable and Low Fat ProductsEasy
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83Viewers Turned StreamersHard
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84Combine Two TablesEasy
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85Find Customer RefereeEasy
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86Second Highest SalaryMedium
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87Big CountriesEasy
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88Article Views IEasy
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89Rising TemperatureEasy
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90Average Time of Process per MachineEasy
Database
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91Employees Earning More Than Their ManagersEasy
Database
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92Managers with at Least 5 Direct ReportsMedium
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93Employee BonusEasy
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94Average Selling PriceEasy
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95Consecutive NumbersMedium
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96Students and ExaminationsEasy
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97Customer Who Visited but Did Not Make Any TransactionsEasy
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98Replace Employee ID With The Unique IdentifierEasy
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99Monthly Transactions IMedium
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100Triangle JudgementEasy
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101Invalid TweetsEasy
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102Nth Highest SalaryMedium
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103Rank ScoresMedium
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104Duplicate EmailsEasy
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105Queries Quality and PercentageEasy
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106Immediate Food Delivery IIMedium
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107Exchange SeatsMedium
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108Confirmation RateMedium
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109Product Price at a Given DateMedium
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110Percentage of Users Attended a ContestEasy
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111User Activity for the Past 30 Days IEasy
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112Game Play Analysis IVMedium
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113The Number of Employees Which Report to Each EmployeeEasy
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114Project Employees IEasy
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115Product Sales Analysis IEasy
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116Binary Tree NodesMedium
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117Calculate Compressed MeanEasy
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118Find Expensive CitiesEasy
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119Class PerformanceMedium
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120Loan TypesEasy
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121Top Three WineriesHard
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122Customers Who Never OrderEasy
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123Not Boring MoviesEasy
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124Employees Whose Manager Left the CompanyEasy
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125Department Highest SalaryMedium
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126Delete Duplicate EmailsEasy
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127Fix Names in a TableEasy
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128Department Top Three SalariesHard
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129Last Person to Fit in the BusMedium
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130Primary Department for Each EmployeeEasy
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131Customers Who Bought All ProductsMedium
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132Find Followers CountEasy
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133Investments in 2016Medium
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134Customer Placing the Largest Number of OrdersEasy
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135Movie RatingMedium
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136Find Users With Valid E-MailsEasy
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137Product Sales Analysis IIIMedium
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138Calculate Special BonusEasy
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139Patients With a ConditionEasy
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140Trips and UsersHard
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141Group Sold Products By The DateEasy
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142Classes With at Least 5 StudentsEasy
Database
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143The Latest Login in 2020Easy
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144Number of Unique Subjects Taught by Each TeacherEasy
Database
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145Reformat Department TableEasy
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146Game Play Analysis IEasy
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147Friend Requests II: Who Has the Most FriendsMedium
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148Highest Grade For Each StudentMedium
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149Find Students Who ImprovedMedium
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150Tree NodeMedium
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151Median Employee SalaryHard
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152All People Report to the Given ManagerMedium
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153Find the Subtasks That Did Not ExecuteHard
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154Find Customers With Positive Revenue this YearEasy
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155Top TravellersEasy
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156Bank Account Summary IIEasy
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157Actors and Directors Who Cooperated At Least Three TimesEasy
Database
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158Sales Analysis IIIEasy
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159Restaurant GrowthMedium
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160Rearrange Products TableEasy
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161Biggest Single NumberEasy
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162Market Analysis IMedium
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163Strong FriendshipMedium
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164Recyclable and Low Fat ProductsEasy
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165Viewers Turned StreamersHard
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166Combine Two TablesEasy
Database
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167Second Highest SalaryMedium
Database
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168Article Views IEasy
Database
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169Big CountriesEasy
Database
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170Find Customer RefereeEasy
Database
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171Rising TemperatureEasy
Database
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172Employees Earning More Than Their ManagersEasy
Database
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173Average Time of Process per MachineEasy
Database
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174Employee BonusEasy
Database
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175Managers with at Least 5 Direct ReportsMedium
Database
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176Average Selling PriceEasy
Database
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177Replace Employee ID With The Unique IdentifierEasy
Database
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178Customer Who Visited but Did Not Make Any TransactionsEasy
Database
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179Consecutive NumbersMedium
Database
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180Monthly Transactions IMedium
Database
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181Students and ExaminationsEasy
Database
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182Triangle JudgementEasy
Database
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183Nth Highest SalaryMedium
Database
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184Duplicate EmailsEasy
Database
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185Invalid TweetsEasy
Database
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186Customers Who Never OrderEasy
Database
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187Rank ScoresMedium
Database
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188Project Employees IEasy
Database
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189User Activity for the Past 30 Days IEasy
Database
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190Product Price at a Given DateMedium
Database
Solve →
191Queries Quality and PercentageEasy
Database
Solve →
192Game Play Analysis IVMedium
Database
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193Immediate Food Delivery IIMedium
Database
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194Exchange SeatsMedium
Database
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195Confirmation RateMedium
Database
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196Delete Duplicate EmailsEasy
Database
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197Percentage of Users Attended a ContestEasy
Database
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198Not Boring MoviesEasy
Database
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199The Number of Employees Which Report to Each EmployeeEasy
Database
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200Product Sales Analysis IEasy
Database
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201Median Employee SalaryHard
Database
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202All People Report to the Given ManagerMedium
Database
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203Find the Subtasks That Did Not ExecuteHard
Database
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204Find Customers With Positive Revenue this YearEasy
Database
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205Employees Whose Manager Left the CompanyEasy
Database
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206Fix Names in a TableEasy
Database
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207Binary Tree NodesMedium
Database
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208Calculate Compressed MeanEasy
Database
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209Top Three WineriesHard
Database
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210Find Expensive CitiesEasy
Database
Solve →
211Class PerformanceMedium
Database
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212Loan TypesEasy
Database
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213Department Highest SalaryMedium
Database
Solve →
214Find Followers CountEasy
Database
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215Investments in 2016Medium
Database
Solve →
216Department Top Three SalariesHard
Database
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217Product Sales Analysis IIIMedium
Database
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218Last Person to Fit in the BusMedium
Database
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219Primary Department for Each EmployeeEasy
Database
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220Customers Who Bought All ProductsMedium
Database
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221Movie RatingMedium
Database
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222Game Play Analysis IEasy
Database
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223Number of Unique Subjects Taught by Each TeacherEasy
Database
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224Customer Placing the Largest Number of OrdersEasy
Database
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225Trips and UsersHard
Database
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226Group Sold Products By The DateEasy
Database
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227Classes With at Least 5 StudentsEasy
Database
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228Calculate Special BonusEasy
Database
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229Find Users With Valid E-MailsEasy
Database
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230Reformat Department TableEasy
Database
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231Patients With a ConditionEasy
Database
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232Restaurant GrowthMedium
Database
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233The Latest Login in 2020Easy
Database
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234Friend Requests II: Who Has the Most FriendsMedium
Database
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235Actors and Directors Who Cooperated At Least Three TimesEasy
Database
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236Market Analysis IMedium
Database
Solve →
237Biggest Single NumberEasy
Database
Solve →
238Top TravellersEasy
Database
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239Highest Grade For Each StudentMedium
Database
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240Find Students Who ImprovedMedium
Database
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241Sales Analysis IIIEasy
Database
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242Count Salary CategoriesMedium
Database
Solve →
243Tree NodeMedium
Database
Solve →
244Bank Account Summary IIEasy
Database
Solve →
245Strong FriendshipMedium
Database
Solve →
246DNA Pattern RecognitionMedium
Database
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247Human Traffic of StadiumHard
Database
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248Find COVID Recovery PatientsMedium
Database
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249Rearrange Products TableEasy
Database
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250Daily Leads and PartnersEasy
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251Sales PersonEasy
Database
Solve →