To perform insert and select operations using Knex in a similar manner to SQL, follow these steps:
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
.
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>' } });
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.
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.
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.
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.
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Asked: 2022-08-30 11:00:00 +0000
Seen: 12 times
Last updated: Jun 23 '22
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