diff --git a/packages/backend-core/src/sql/sql.ts b/packages/backend-core/src/sql/sql.ts
index 9bc2092b83..3224fc043e 100644
--- a/packages/backend-core/src/sql/sql.ts
+++ b/packages/backend-core/src/sql/sql.ts
@@ -571,6 +571,31 @@ class InternalBuilder {
     return query.insert(parsedBody)
   }
 
+  bulkUpsert(knex: Knex, json: QueryJson): Knex.QueryBuilder {
+    const { endpoint, body } = json
+    let query = this.knexWithAlias(knex, endpoint)
+    if (!Array.isArray(body)) {
+      return query
+    }
+    const parsedBody = body.map(row => parseBody(row))
+    if (
+      this.client === SqlClient.POSTGRES ||
+      this.client === SqlClient.SQL_LITE ||
+      this.client === SqlClient.MY_SQL
+    ) {
+      const primary = json.meta.table.primary
+      if (!primary) {
+        throw new Error("Primary key is required for upsert")
+      }
+      return query.insert(parsedBody).onConflict(primary).merge()
+    } else if (this.client === SqlClient.MS_SQL) {
+      // No upsert or onConflict support in MSSQL yet, see:
+      //   https://github.com/knex/knex/pull/6050
+      return query.insert(parsedBody)
+    }
+    return query.upsert(parsedBody)
+  }
+
   read(knex: Knex, json: QueryJson, limit: number): Knex.QueryBuilder {
     let { endpoint, resource, filters, paginate, relationships, tableAliases } =
       json
@@ -708,6 +733,9 @@ class SqlQueryBuilder extends SqlTableQueryBuilder {
       case Operation.BULK_CREATE:
         query = builder.bulkCreate(client, json)
         break
+      case Operation.BULK_UPSERT:
+        query = builder.bulkUpsert(client, json)
+        break
       case Operation.CREATE_TABLE:
       case Operation.UPDATE_TABLE:
       case Operation.DELETE_TABLE:
diff --git a/packages/server/src/api/controllers/table/external.ts b/packages/server/src/api/controllers/table/external.ts
index bd674d7d38..f1b186c233 100644
--- a/packages/server/src/api/controllers/table/external.ts
+++ b/packages/server/src/api/controllers/table/external.ts
@@ -98,7 +98,7 @@ export async function bulkImport(
     table = processed.table
   }
 
-  await handleRequest(Operation.BULK_CREATE, table._id!, {
+  await handleRequest(Operation.BULK_UPSERT, table._id!, {
     rows: parsedRows,
   })
   await events.rows.imported(table, parsedRows.length)
diff --git a/packages/server/src/api/routes/tests/row.spec.ts b/packages/server/src/api/routes/tests/row.spec.ts
index e5599c6d81..4d1b4f028b 100644
--- a/packages/server/src/api/routes/tests/row.spec.ts
+++ b/packages/server/src/api/routes/tests/row.spec.ts
@@ -26,6 +26,7 @@ import {
   Table,
   TableSourceType,
   UpdatedRowEventEmitter,
+  TableSchema,
 } from "@budibase/types"
 import { generator, mocks } from "@budibase/backend-core/tests"
 import _, { merge } from "lodash"
@@ -64,6 +65,7 @@ describe.each([
   [DatabaseName.MARIADB, getDatasource(DatabaseName.MARIADB)],
 ])("/rows (%s)", (providerType, dsProvider) => {
   const isInternal = dsProvider === undefined
+  const isMSSQL = providerType === DatabaseName.SQL_SERVER
   const config = setup.getConfig()
 
   let table: Table
@@ -88,6 +90,23 @@ describe.each([
     // the table name they're writing to.
     ...overrides: Partial<Omit<SaveTableRequest, "name">>[]
   ): SaveTableRequest {
+    const defaultSchema: TableSchema = {
+      id: {
+        type: FieldType.AUTO,
+        name: "id",
+        autocolumn: true,
+        constraints: {
+          presence: true,
+        },
+      },
+    }
+
+    for (const override of overrides) {
+      if (override.primary) {
+        delete defaultSchema.id
+      }
+    }
+
     const req: SaveTableRequest = {
       name: uuid.v4().substring(0, 10),
       type: "table",
@@ -96,16 +115,7 @@ describe.each([
         : TableSourceType.INTERNAL,
       sourceId: datasource ? datasource._id! : INTERNAL_TABLE_SOURCE_ID,
       primary: ["id"],
-      schema: {
-        id: {
-          type: FieldType.AUTO,
-          name: "id",
-          autocolumn: true,
-          constraints: {
-            presence: true,
-          },
-        },
-      },
+      schema: defaultSchema,
     }
     return merge(req, ...overrides)
   }
@@ -960,6 +970,121 @@ describe.each([
         row = await config.api.row.save(table._id!, {})
         expect(row.autoId).toEqual(3)
       })
+
+    it("should be able to bulkImport rows", async () => {
+      const table = await config.api.table.save(
+        saveTableRequest({
+          schema: {
+            name: {
+              type: FieldType.STRING,
+              name: "name",
+            },
+            description: {
+              type: FieldType.STRING,
+              name: "description",
+            },
+          },
+        })
+      )
+
+      const rowUsage = await getRowUsage()
+
+      await config.api.row.bulkImport(table._id!, {
+        rows: [
+          {
+            name: "Row 1",
+            description: "Row 1 description",
+          },
+          {
+            name: "Row 2",
+            description: "Row 2 description",
+          },
+        ],
+      })
+
+      const rows = await config.api.row.fetch(table._id!)
+      expect(rows.length).toEqual(2)
+
+      rows.sort((a, b) => a.name.localeCompare(b.name))
+      expect(rows[0].name).toEqual("Row 1")
+      expect(rows[0].description).toEqual("Row 1 description")
+      expect(rows[1].name).toEqual("Row 2")
+      expect(rows[1].description).toEqual("Row 2 description")
+
+      await assertRowUsage(isInternal ? rowUsage + 2 : rowUsage)
+    })
+
+    // Upserting isn't yet supported in MSSQL, see:
+    //   https://github.com/knex/knex/pull/6050
+    !isMSSQL &&
+      it("should be able to update existing rows with bulkImport", async () => {
+        const table = await config.api.table.save(
+          saveTableRequest({
+            primary: ["userId"],
+            schema: {
+              userId: {
+                type: FieldType.NUMBER,
+                name: "userId",
+                constraints: {
+                  presence: true,
+                },
+              },
+              name: {
+                type: FieldType.STRING,
+                name: "name",
+              },
+              description: {
+                type: FieldType.STRING,
+                name: "description",
+              },
+            },
+          })
+        )
+
+        const row1 = await config.api.row.save(table._id!, {
+          userId: 1,
+          name: "Row 1",
+          description: "Row 1 description",
+        })
+
+        const row2 = await config.api.row.save(table._id!, {
+          userId: 2,
+          name: "Row 2",
+          description: "Row 2 description",
+        })
+
+        await config.api.row.bulkImport(table._id!, {
+          identifierFields: ["userId"],
+          rows: [
+            {
+              userId: row1.userId,
+              name: "Row 1 updated",
+              description: "Row 1 description updated",
+            },
+            {
+              userId: row2.userId,
+              name: "Row 2 updated",
+              description: "Row 2 description updated",
+            },
+            {
+              userId: 3,
+              name: "Row 3",
+              description: "Row 3 description",
+            },
+          ],
+        })
+
+        const rows = await config.api.row.fetch(table._id!)
+        expect(rows.length).toEqual(3)
+
+        rows.sort((a, b) => a.name.localeCompare(b.name))
+        expect(rows[0].name).toEqual("Row 1 updated")
+        expect(rows[0].description).toEqual("Row 1 description updated")
+        expect(rows[1].name).toEqual("Row 2 updated")
+        expect(rows[1].description).toEqual("Row 2 description updated")
+        expect(rows[2].name).toEqual("Row 3")
+        expect(rows[2].description).toEqual("Row 3 description")
+      })
   })
 
   describe("enrich", () => {
diff --git a/packages/types/src/sdk/datasources.ts b/packages/types/src/sdk/datasources.ts
index 3a788cbac6..23caa2c618 100644
--- a/packages/types/src/sdk/datasources.ts
+++ b/packages/types/src/sdk/datasources.ts
@@ -9,6 +9,7 @@ export enum Operation {
   UPDATE = "UPDATE",
   DELETE = "DELETE",
   BULK_CREATE = "BULK_CREATE",
+  BULK_UPSERT = "BULK_UPSERT",
   CREATE_TABLE = "CREATE_TABLE",
   UPDATE_TABLE = "UPDATE_TABLE",
   DELETE_TABLE = "DELETE_TABLE",
@@ -20,6 +21,7 @@ export const RowOperations = [
   Operation.UPDATE,
   Operation.DELETE,
   Operation.BULK_CREATE,
+  Operation.BULK_UPSERT,
 ]
 
 export enum QueryType {