106 lines
2.4 KiB
Markdown
Executable File
106 lines
2.4 KiB
Markdown
Executable File
## Queries-B3
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> [!NOTE]
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> Use Employee database created in Assignment B-01 and perform following aggregation operation
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> Refer [Queries-B1](https://git.kska.io/sppu-te-comp-content/DatabaseManagementSystems/src/branch/main/Practical/Assignment-B1/Queries-B1.md)
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1. Return the Total Salary of per Company
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```mongodb
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db.Employee.mapReduce(
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function() {
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emit(this.Company_name, this.Salary);
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},
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function(key, values) {
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return Array.sum(values);
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},
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{ out: "total_salary_per_company" }
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);
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```
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2. Return the Total Salary of Company Name:"Oscorp"
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```mongodb
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db.Employee.mapReduce(
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function() {
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if (this.Company_name === "Oscorp") {
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emit(this.Company_name, this.Salary);
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}
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},
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function(key, values) {
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return Array.sum(values);
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},
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{ out: "total_salary_oscorp" }
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);
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```
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3. Return the Avg Salary of Company whose address is “Pune".
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```mongodb
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db.Employee.mapReduce(
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function() {
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if (this.Address.some(addr => addr.PAddr.includes("Pune"))) {
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emit("Pune", this.Salary);
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}
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},
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function(key, values) {
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return Array.avg(values);
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},
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{ out: "avg_salary_pune" }
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);
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```
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4. Return the Total Salary for each Designation of `Wayne Industries`.
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```mongodb
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db.Employee.mapReduce(
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function() {
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if (this.Company_name === "Wayne Industries") {
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emit(this.Designation, this.Salary);
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}
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},
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function(key, values) {
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return Array.sum(values);
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},
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{ out: "total_salary_wayne" }
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);
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```
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5. Return total count for “State=Maharashtra”
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```mongodb
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db.Employee.mapReduce(
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function() {
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this.Address.forEach(function(addr) {
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if (addr.LAddr === "Maharashtra") {
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emit("Maharashtra", 1);
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}
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});
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},
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function(key, values) {
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return Array.sum(values);
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},
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{ out: "count_state_maharashtra" }
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);
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```
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6. Return Count for State Telangana and Age greater than 40.
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```mongodb
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db.Employee.mapReduce(
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function() {
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if (this.Age > 40) {
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this.Address.forEach(function(addr) {
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if (addr.LAddr === "Telangana") {
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emit("Telangana_Age_Above_40", 1);
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}
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});
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}
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},
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function(key, values) {
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return Array.sum(values);
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},
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{ out: "count_telangana_age_above_40" }
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);
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```
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