diff --git a/packages/backend-core/src/sql/sql.ts b/packages/backend-core/src/sql/sql.ts
index 9bc2092b83..c4f0d7015f 100644
--- a/packages/backend-core/src/sql/sql.ts
+++ b/packages/backend-core/src/sql/sql.ts
@@ -571,6 +571,27 @@ 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()
+    }
+    return query.upsert(parsedBody)
+  }
+
   read(knex: Knex, json: QueryJson, limit: number): Knex.QueryBuilder {
     let { endpoint, resource, filters, paginate, relationships, tableAliases } =
       json
@@ -708,6 +729,9 @@ 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 ba935fc6ae..09b1f0fe01 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"
@@ -59,9 +60,9 @@ async function waitForEvent(
 describe.each([
   ["internal", undefined],
   [DatabaseName.POSTGRES, getDatasource(DatabaseName.POSTGRES)],
-  // [DatabaseName.MYSQL, getDatasource(DatabaseName.MYSQL)],
-  // [DatabaseName.SQL_SERVER, getDatasource(DatabaseName.SQL_SERVER)],
-  // [DatabaseName.MARIADB, getDatasource(DatabaseName.MARIADB)],
+  [DatabaseName.MYSQL, getDatasource(DatabaseName.MYSQL)],
+  [DatabaseName.SQL_SERVER, getDatasource(DatabaseName.SQL_SERVER)],
+  [DatabaseName.MARIADB, getDatasource(DatabaseName.MARIADB)],
 ])("/rows (%s)", (providerType, dsProvider) => {
   const isInternal = dsProvider === undefined
   const config = setup.getConfig()
@@ -88,6 +89,23 @@ 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 +114,7 @@ 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)
   }
@@ -929,7 +938,7 @@ describe.each([
     })
   })
 
-  describe.only("bulkImport", () => {
+  describe("bulkImport", () => {
     isInternal &&
       it("should update Auto ID field after bulk import", async () => {
         const table = await config.api.table.save(
@@ -1004,9 +1013,10 @@ describe.each([
       await assertRowUsage(isInternal ? rowUsage + 2 : rowUsage)
     })
 
-    it.only("should be able to update existing rows with bulkImport", async () => {
+    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,
diff --git a/packages/types/src/sdk/datasources.ts b/packages/types/src/sdk/datasources.ts
index 3a788cbac6..da10bf26c6 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",