diff --git a/api/src/database/helpers/datetime.ts b/api/src/database/helpers/datetime.ts
new file mode 100644
index 0000000000..eec90a6c81
--- /dev/null
+++ b/api/src/database/helpers/datetime.ts
@@ -0,0 +1,90 @@
+import { Knex } from 'knex';
+
+interface IDateTimeHelper {
+	year(column: string): Knex.Raw;
+	month(column: string): Knex.Raw;
+	week(column: string): Knex.Raw;
+	day(column: string): Knex.Raw;
+	weekday(column: string): Knex.Raw;
+	hour(column: string): Knex.Raw;
+	minute(column: string): Knex.Raw;
+	second(column: string): Knex.Raw;
+}
+
+class DateTimeHelper implements IDateTimeHelper {
+	protected knex: Knex;
+
+	constructor(knex: Knex) {
+		this.knex = knex;
+	}
+
+	year(column: string): Knex.Raw {
+		throw new Error(`Method "year" not implemented for dialect ${this.knex.client.constructor.name}`);
+	}
+
+	month(column: string): Knex.Raw {
+		throw new Error(`Method "month" not implemented for dialect ${this.knex.client.constructor.name}`);
+	}
+
+	week(column: string): Knex.Raw {
+		throw new Error(`Method "week" not implemented for dialect ${this.knex.client.constructor.name}`);
+	}
+
+	day(column: string): Knex.Raw {
+		throw new Error(`Method "date" not implemented for dialect ${this.knex.client.constructor.name}`);
+	}
+
+	weekday(column: string): Knex.Raw {
+		throw new Error(`Method "weekday" not implemented for dialect ${this.knex.client.constructor.name}`);
+	}
+
+	hour(column: string): Knex.Raw {
+		throw new Error(`Method "hour" not implemented for dialect ${this.knex.client.constructor.name}`);
+	}
+
+	minute(column: string): Knex.Raw {
+		throw new Error(`Method "minute" not implemented for dialect ${this.knex.client.constructor.name}`);
+	}
+
+	second(column: string): Knex.Raw {
+		throw new Error(`Method "second" not implemented for dialect ${this.knex.client.constructor.name}`);
+	}
+}
+
+export class DateTimeHelperPostgres extends DateTimeHelper {
+	constructor(knex: Knex) {
+		super(knex);
+	}
+
+	year(column: string): Knex.Raw {
+		return this.knex.raw('EXTRACT(YEAR FROM ??) as ??', [column, `${column}_year`]);
+	}
+
+	month(column: string): Knex.Raw {
+		return this.knex.raw('EXTRACT(MONTH FROM ??)', [column]);
+	}
+
+	week(column: string): Knex.Raw {
+		return this.knex.raw('EXTRACT(WEEK FROM ??)', [column]);
+	}
+
+	day(column: string): Knex.Raw {
+		return this.knex.raw('EXTRACT(DAY FROM ??)', [column]);
+	}
+
+	weekday(column: string): Knex.Raw {
+		return this.knex.raw('EXTRACT(DOW FROM ??)', [column]);
+	}
+
+	hour(column: string): Knex.Raw {
+		return this.knex.raw('EXTRACT(HOUR FROM ??)', [column]);
+	}
+
+	minute(column: string): Knex.Raw {
+		return this.knex.raw('EXTRACT(MINUTE FROM ??)', [column]);
+	}
+
+	second(column: string): Knex.Raw {
+		return this.knex.raw('EXTRACT(SECOND FROM ??)', [column]);
+	}
+}
diff --git a/api/src/database/helpers/index.ts b/api/src/database/helpers/index.ts
new file mode 100644
index 0000000000..36457a1e56
--- /dev/null
+++ b/api/src/database/helpers/index.ts
@@ -0,0 +1,28 @@
+import { Knex } from 'knex';
+
+import { DateTimeHelperPostgres } from './datetime';
+
+export function knexTransforms(knex: Knex) {
+	switch (knex.client.constructor.name) {
+		// case 'Client_MySQL':
+		// 	constructor = require('./dialects/mysql').default;
+		// 	break;
+		case 'Client_PG':
+			return {
+				datetime: new DateTimeHelperPostgres(knex),
+			};
+		// case 'Client_SQLite3':
+		// 	constructor = require('./dialects/sqlite').default;
+		// 	break;
+		// case 'Client_Oracledb':
+		// case 'Client_Oracle':
+		// 	constructor = require('./dialects/oracledb').default;
+		// 	break;
+		// case 'Client_MSSQL':
+		// 	constructor = require('./dialects/mssql').default;
+		// 	break;
+
+		default:
+			throw Error('Unsupported driver used: ' + knex.client.constructor.name);
+	}
+}
diff --git a/api/src/utils/apply-query.ts b/api/src/utils/apply-query.ts
index 0641315d81..6110f5d846 100644
--- a/api/src/utils/apply-query.ts
+++ b/api/src/utils/apply-query.ts
@@ -2,7 +2,7 @@ import { Knex } from 'knex';
 import { clone, get, isPlainObject, set } from 'lodash';
 import { customAlphabet } from 'nanoid';
 import validate from 'uuid-validate';
-import { ForbiddenException, InvalidQueryException } from '../exceptions';
+import { InvalidQueryException } from '../exceptions';
 import { Aggregate, Filter, Query, Relation, SchemaOverview } from '../types';
 import { getRelationType } from './get-relation-type';
 
diff --git a/api/src/utils/sanitize-query.ts b/api/src/utils/sanitize-query.ts
index 7b1e84447f..41f2942b46 100644
--- a/api/src/utils/sanitize-query.ts
+++ b/api/src/utils/sanitize-query.ts
@@ -1,4 +1,3 @@
-import camelcase from 'camelcase';
 import { flatten, get, merge, set } from 'lodash';
 import logger from '../logger';
 import { Accountability, Aggregate, Filter, Meta, Query, Sort } from '../types';