Ask Your Question
4

How to perform insert and select operations using Knex in a similar manner to SQL?

asked 2022-08-30 11:00:00 +0000

woof gravatar image

edit retag flag offensive close merge delete

1 Answer

Sort by ยป oldest newest most voted
2

answered 2022-06-23 04:00:00 +0000

lalupa gravatar image

To perform insert and select operations using Knex in a similar manner to SQL, follow these steps:

  1. First, install Knex and the database driver for your database of choice (e.g. mysql, pg) by running the command npm install knex <driver> --save.

  2. Create a Knex instance by initializing it with the database configuration, like this:

    const knex = require('knex')({ client: '<driver>', connection: { host: '<hostname>', user: '<username>', password: '<password>', database: '<database_name>' } }); 
  3. To insert data into a table, use the insert() method:

    knex('table_name').insert({ column1: 'value1', column2: 'value2', ... }).then(function(result) { console.log('Inserted successfully'); }).catch(function(err) { console.error(err); }); 

    Replace table_name, column1, column2, etc. with your table and column names, and the respective values.

  4. To select data from a table, use the select() method:

    knex.select('*').from('table_name').then(function(rows) { console.log(rows); }).catch(function(err) { console.error(err); }); 

    Replace table_name with the name of the table you want to retrieve data from.

  5. You can also filter the results by using the where() method:

    knex.select('*').from('table_name').where('column_name', 'value').then(function(rows) { console.log(rows); }).catch(function(err) { console.error(err); }); 

    Replace column_name and value with the column and value you want to filter by.

  6. Finally, close the Knex instance by calling knex.destroy().

These steps should help you perform insert and select operations using Knex in a similar manner to SQL.

edit flag offensive delete link more

Your Answer

Please start posting anonymously - your entry will be published after you log in or create a new account. This space is reserved only for answers. If you would like to engage in a discussion, please instead post a comment under the question or an answer that you would like to discuss

Add Answer


Question Tools

Stats

Asked: 2022-08-30 11:00:00 +0000

Seen: 7 times

Last updated: Jun 23 '22