ToolJet/docs/versioned_docs/version-2.36.0/how-to/bulk-update-multiple-rows-in-table.md

---
id: bulk-update-multiple-rows
title: Bulk Update Multiple Rows in Table
---
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For the purpose of this guide, it's presumed that you've already established a successful connection to your data source. We'll use PostgreSQL for this example, but you can adjust the queries based on the SQL database that you are using.

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## 1. Create a Query to Get the Data

- Create a PostgreSQL query in SQL mode, rename it to *users* and enter the below code.
  
```sql
SELECT * FROM <table name> // *replace <table name> with your table name*
```
- Enable the `Run the query on application load?` option to execute the query automatically when the application starts. 
- Click on the **Run** button to fetch the data from the database.

<div style={{textAlign: 'center'}}>
    <img style={{ border:'0', marginBottom:'15px' }} className="screenshot-full" src="/img/how-to/bulk-update-multiple/new/data.png" alt="Fetch the Data" />
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## 2. Display the Data on the Table

- Drag and drop a **Table** component onto the canvas from the components library on the right.
- Click on the Table component to open its properties on the right sidebar.
- To populate the Table with the data returned by the query, add the below code under the `Data` field of the Table:
```js
{{queries.users.data}}
```

<div style={{textAlign: 'center'}}>
    <img style={{ border:'0', marginBottom:'15px' }} className="screenshot-full" src="/img/how-to/bulk-update-multiple/new/populate.png" alt="Display Data on the Table" />
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## 3. Make the Columns Editable

- Under the Columns accordion, click on the column name that you want to make editable.
- On clicking the column name, a new section will open. Enable the toggle for `Make editable` to make the column editable.

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    <img style={{ border:'0', marginBottom:'15px' }} className="screenshot-full" src="/img/how-to/bulk-update-multiple/new/editable.png" alt="Make Column Editable" />
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## 4. Enable Multiple Row Selection

- Under the Row Selection accordion, enable the `Allow Selection`, `Highlight Selected Row`, and `Bulk Selection` option.

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    <img style={{ border:'0', marginBottom:'15px' }} className="screenshot-full" src="/img/how-to/bulk-update-multiple/new/rowselect.png" alt="Multiple Row Selection" />
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## 5. Create a Custom JS query

- Create a new Run Javascript query and use the code below to generate the SQL query for updating multiple rows. The query will be named as *runjs1* by default. 

```js
const uniqueIdentifier = "id"
const cols = Object.values(components.table1.changeSet).map((col, index) => {
  return {
    col: Object.keys(col),
    [uniqueIdentifier]: Object.values(components.table1.dataUpdates)[index][uniqueIdentifier],
    values: Object.values(col),
  };
});

const sql = cols.map((column) => {
  const { col, id, values } = column;
  const cols = col.map((col, index) => `${col} = '${values[index]}'`);
  return `UPDATE users SET ${cols.join(", ")} WHERE id = '${id}';`;
});

return sql
```

Here the unique identifier is **id** and Table component's name is **table1**. You can update the unique identifier if you are using a different column as a unique identifier. You can also update the Table name if you have renamed it, the default name is *table1*.

<div style={{textAlign: 'center'}}>
    <img style={{ border:'0', marginBottom:'15px' }} className="screenshot-full" src="/img/how-to/bulk-update-multiple/new/runjs1.png" alt="RunJS code to later the data" />
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## 6. Create an Update Query

- Create a PostgreSQL query in SQL mode and rename it to *update*:
    
```sql
{{queries.runjs1.data.join(' ')}}
```

- This query will run the SQL query generated by the *runjs1* query.

<div style={{textAlign: 'center'}}>
    <img style={{ border:'0', marginBottom:'15px' }} className="screenshot-full" src="/img/how-to/bulk-update-multiple/new/update.png" alt="Bulk Update Rows" />
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## 7. Adding Event Handlers to Execute Queries in Sequence

- Edit the Table component and add an event handler for `Save Changes` event so that whenever a user will edit the Table and hit the Save Changes button the *runjs1* query will run.
- Optionally, add loading state to the Table by clicking on `fx` next to the `Loading state` property.
- Use the below code to show the loading state whenever a query is getting executed.
```js
{{queries.users.isLoading || queries.update.isLoading}}
```

<div style={{textAlign: 'center'}}>
    <img style={{ border:'0' }} className="screenshot-full" src="/img/how-to/bulk-update-multiple/new/savechanges.png" alt="Adding Events" />
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- Now, go to the *runjs1* query and add an event to run the *update* query for Query Success event. This will run the *update* query after the *runjs1* query is successfully executed.

<div style={{textAlign: 'center'}}>
    <img style={{ border:'0' }} className="screenshot-full" src="/img/how-to/bulk-update-multiple/new/querysuccess.png" alt="Query Success" />
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The data needs to reload once the *update* query runs since we want the Table component to be populated with the updated data. 

- Add a new event handler in the *update* query.
- Select Query Success as the Event and Run Query as the Action.
- Select *users* as Query.

This will refresh the table whenever the *update* query will be run.

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