diff --git a/scripts/test-api.js b/scripts/test-api.js
index db94393..eb481ed 100644
--- a/scripts/test-api.js
+++ b/scripts/test-api.js
@@ -50,6 +50,11 @@ async function shutdown(pool, code = 0) {
 }
 
 const METHODS = [
+  {
+    value: 'setup.company',
+    label: chalk.cyan('setup company'),
+    hint: 'email + name + lang',
+  },
   { value: 'company.create', label: 'company.create', hint: '{name} → id' },
   { value: 'company.list', label: 'company.list', hint: '→ rows' },
   { value: 'company.setDefaultLang', label: 'company.setDefaultLang', hint: 'companyId, langId' },
@@ -60,8 +65,11 @@ const METHODS = [
   { value: 'lang.list', label: 'lang.list', hint: '→ rows' },
   { value: 'lang.delete', label: 'lang.delete', hint: 'id' },
   { value: 'category.create', label: 'category.create', hint: '{parent_id, sort} → id' },
+  { value: 'category.updateParentId', label: 'category.updateParentId', hint: 'id, parentId' },
+  { value: 'category.delete', label: 'category.delete', hint: 'id' },
   { value: 'category.getTree', label: 'category.getTree', hint: 'rootId → rows' },
   { value: 'companyuser.add', label: 'companyuser.add', hint: 'companyId, authId → id' },
+  { value: 'companyuser.delete', label: 'companyuser.delete', hint: 'id' },
   { value: 'companyuser.getByEmail', label: 'companyuser.getByEmail', hint: 'email → ids' },
   { value: 'google_auth.add', label: 'google_auth.add', hint: 'email → authId' },
   { value: 'google_auth.list', label: 'google_auth.list', hint: '→ rows' },
@@ -73,6 +81,55 @@ const METHODS = [
 
 async function runMethod(client, action) {
   switch (action) {
+    case 'setup.company': {
+      const email = await askText('Email', {
+        placeholder: 'user@example.com',
+        validate: (v) => (!v?.trim() ? 'Required' : undefined),
+      });
+      if (email == null) return;
+      const name = await askText('Company name', {
+        placeholder: 'Acme',
+        validate: (v) => (!v?.trim() ? 'Required' : undefined),
+      });
+      if (name == null) return;
+      const iso639 = await askText('Default language (iso639)', {
+        placeholder: 'de',
+        validate: (v) => (!v?.trim() ? 'Required' : undefined),
+      });
+      if (iso639 == null) return;
+
+      const langs = await client.lang.list();
+      const existingLang = langs.find((row) => row.iso639 === iso639);
+      const langId = existingLang
+        ? existingLang.id
+        : await client.lang.create(iso639);
+
+      const companyId = await client.company.create({ name });
+      await client.company.setDefaultLang(companyId, langId);
+
+      const auths = await client.google_auth.list();
+      const existingAuth = auths.find((row) => row.email === email);
+      const authId = existingAuth
+        ? existingAuth.id
+        : await client.google_auth.add(email);
+
+      const companyUserId = await client.companyuser.add(companyId, authId);
+
+      return [
+        'created',
+        {
+          companyId,
+          companyUserId,
+          authId,
+          langId,
+          email,
+          name,
+          iso639,
+          langCreated: !existingLang,
+          authCreated: !existingAuth,
+        },
+      ];
+    }
     case 'company.create': {
       const name = await askText('Name', {
         placeholder: 'Acme',
@@ -143,6 +200,25 @@ async function runMethod(client, action) {
       const parent_id = parentRaw === '' ? null : Number(parentRaw);
       return ['id', await client.category.create({ parent_id, sort: Number(sortRaw) })];
     }
+    case 'category.updateParentId': {
+      const id = await askInt('Category id');
+      if (id == null) return;
+      const parentRaw = await askText('parent_id (null as empty)', {
+        placeholder: '',
+        validate: (v) =>
+          v?.trim() && !/^\d+$/.test(v.trim()) ? 'Integer or empty' : undefined,
+      });
+      if (parentRaw == null) return;
+      const parentId = parentRaw === '' ? null : Number(parentRaw);
+      await client.category.updateParentId(Number(id), parentId);
+      return ['ok', true];
+    }
+    case 'category.delete': {
+      const id = await askInt('Category id');
+      if (id == null) return;
+      await client.category.delete(Number(id));
+      return ['ok', true];
+    }
     case 'category.getTree': {
       const rootId = await askInt('Root category id');
       if (rootId == null) return;
@@ -155,6 +231,12 @@ async function runMethod(client, action) {
       if (authId == null) return;
       return ['id', await client.companyuser.add(Number(companyId), Number(authId))];
     }
+    case 'companyuser.delete': {
+      const id = await askInt('Company user id');
+      if (id == null) return;
+      await client.companyuser.delete(Number(id));
+      return ['ok', true];
+    }
     case 'companyuser.getByEmail': {
       const email = await askText('Email', {
         placeholder: 'user@example.com',
@@ -237,6 +319,24 @@ async function main() {
     }
 
     if (action === 'purge') {
+      const confirm1 = await p.confirm({
+        message: chalk.red('Drop ALL tables?'),
+        initialValue: false,
+      });
+      if (p.isCancel(confirm1) || !confirm1) {
+        p.log.warn('Purge cancelled');
+        continue;
+      }
+
+      const confirm2 = await p.confirm({
+        message: chalk.red('Really purge? This cannot be undone.'),
+        initialValue: false,
+      });
+      if (p.isCancel(confirm2) || !confirm2) {
+        p.log.warn('Purge cancelled');
+        continue;
+      }
+
       const run = p.spinner();
       run.start('Purging…');
       await client.purge();
diff --git a/src/index.js b/src/index.js
index b0ff30e..7a7a8c8 100644
--- a/src/index.js
+++ b/src/index.js
@@ -1,5 +1,6 @@
 import companyuserGetByEmail from './store/companyuser/getByEmail.js';
 import companyuserAdd from './store/companyuser/add.js';
+import companyuserDelete from './store/companyuser/delete.js';
 import companyGetByCompanyUserId from './store/company/getByCompanyUserId.js';
 import companyCreate from './store/company/create.js';
 import companySetDefaultLang from './store/company/setDefaultLang.js';
@@ -8,6 +9,8 @@ import companyDelete from './store/company/delete.js';
 import companyList from './store/company/list.js';
 import categoryGetTree from './store/category/getTree.js';
 import categoryCreate from './store/category/create.js';
+import categoryUpdateParentId from './store/category/updateParentId.js';
+import categoryDelete from './store/category/delete.js';
 import langCreate from './store/lang/create.js';
 import langDelete from './store/lang/delete.js';
 import langList from './store/lang/list.js';
@@ -24,6 +27,7 @@ export default class LibDashStore {
     this.companyuser = {
       getByEmail: companyuserGetByEmail(pool),
       add: companyuserAdd(pool),
+      delete: companyuserDelete(pool),
     };
 
     this.company = {
@@ -38,6 +42,8 @@ export default class LibDashStore {
     this.category = {
       getTree: categoryGetTree(pool),
       create: categoryCreate(pool),
+      updateParentId: categoryUpdateParentId(pool),
+      delete: categoryDelete(pool),
     };
 
     this.lang = {
diff --git a/src/schema.js b/src/schema.js
index 2504a9a..c40dd66 100644
--- a/src/schema.js
+++ b/src/schema.js
@@ -101,6 +101,7 @@ BEGIN
         name NVARCHAR(255) NOT NULL,
         root_category_id INT NULL,
         default_language_id INT NULL,
+        CONSTRAINT UQ_company_name UNIQUE (name),
         CONSTRAINT FK_company_root_category FOREIGN KEY (root_category_id) REFERENCES category(id) ON DELETE SET NULL,
         CONSTRAINT FK_company_default_language FOREIGN KEY (default_language_id) REFERENCES language(id) ON DELETE SET NULL
     );
diff --git a/src/sql/category.js b/src/sql/category.js
index 11313d8..57f6b97 100644
--- a/src/sql/category.js
+++ b/src/sql/category.js
@@ -20,3 +20,14 @@ INSERT INTO category (parent_id, sort)
 OUTPUT INSERTED.id
 VALUES (@parentId, @sort)
 `;
+
+export const UPDATE_PARENT_ID = `
+UPDATE category
+SET parent_id = @parentId
+WHERE id = @id
+`;
+
+export const DELETE = `
+DELETE FROM category
+WHERE id = @id
+`;
diff --git a/src/sql/company.js b/src/sql/company.js
index d41b4aa..bd5f22c 100644
--- a/src/sql/company.js
+++ b/src/sql/company.js
@@ -10,9 +10,9 @@ WHERE cu.id = @companyUserId
 `;
 
 export const CREATE = `
-INSERT INTO company (name)
+INSERT INTO company (name, root_category_id)
 OUTPUT INSERTED.id
-VALUES (@name)
+VALUES (@name, @rootCategoryId)
 `;
 
 export const LIST = `
diff --git a/src/sql/companyuser.js b/src/sql/companyuser.js
index dfd615d..79b5e42 100644
--- a/src/sql/companyuser.js
+++ b/src/sql/companyuser.js
@@ -10,3 +10,8 @@ INSERT INTO companyuser (google_auth_id, company_id)
 OUTPUT INSERTED.id
 VALUES (@authId, @companyId)
 `;
+
+export const DELETE = `
+DELETE FROM companyuser
+WHERE id = @id
+`;
diff --git a/src/store/category/delete.js b/src/store/category/delete.js
new file mode 100644
index 0000000..c2d3e89
--- /dev/null
+++ b/src/store/category/delete.js
@@ -0,0 +1,11 @@
+import sql from 'mssql';
+import { DELETE } from '../../sql/category.js';
+
+export default function del(pool) {
+  return async (id) => {
+    await pool
+      .request()
+      .input('id', sql.Int, id)
+      .query(DELETE);
+  };
+}
diff --git a/src/store/category/updateParentId.js b/src/store/category/updateParentId.js
new file mode 100644
index 0000000..8029b9d
--- /dev/null
+++ b/src/store/category/updateParentId.js
@@ -0,0 +1,12 @@
+import sql from 'mssql';
+import { UPDATE_PARENT_ID } from '../../sql/category.js';
+
+export default function updateParentId(pool) {
+  return async (id, parentId) => {
+    await pool
+      .request()
+      .input('id', sql.Int, id)
+      .input('parentId', sql.Int, parentId)
+      .query(UPDATE_PARENT_ID);
+  };
+}
diff --git a/src/store/company/create.js b/src/store/company/create.js
index 813b52d..eacd1bc 100644
--- a/src/store/company/create.js
+++ b/src/store/company/create.js
@@ -1,11 +1,21 @@
 import sql from 'mssql';
 import { CREATE } from '../../sql/company.js';
+import { CREATE as CREATE_CATEGORY } from '../../sql/category.js';
 
 export default function create(pool) {
   return async ({ name }) => {
+    const category = await pool
+      .request()
+      .input('parentId', sql.Int, null)
+      .input('sort', sql.Int, 0)
+      .query(CREATE_CATEGORY);
+
+    const rootCategoryId = category.recordset[0].id;
+
     const result = await pool
       .request()
       .input('name', sql.NVarChar(255), name)
+      .input('rootCategoryId', sql.Int, rootCategoryId)
       .query(CREATE);
 
     return result.recordset[0].id;
diff --git a/src/store/companyuser/delete.js b/src/store/companyuser/delete.js
new file mode 100644
index 0000000..3b66e2a
--- /dev/null
+++ b/src/store/companyuser/delete.js
@@ -0,0 +1,11 @@
+import sql from 'mssql';
+import { DELETE } from '../../sql/companyuser.js';
+
+export default function del(pool) {
+  return async (id) => {
+    await pool
+      .request()
+      .input('id', sql.Int, id)
+      .query(DELETE);
+  };
+}