/ActionScript/Move records from table to another using knex migration

Move records from table to another using knex migration

// modified by Emmanuel Mahuni to use async/await more readable code
exports.up = async function(knex) {
 	await knex.schema.createTable('table_b', t => {
      t.string('col_a')
      t.string('col_b')
    })
  
    await knex.schema.createTable('table_c', t => {
      t.string('col_c')
      t.string('col_d')
    })
  
    let rows = await knex('table_a').select('col_a', 'col_b')
    await knex('table_b').insert(rows)
    
  	rows = await knex('table_a').select('col_c', 'col_d')
    await knex('table_c').insert(rows)
  
    await knex.schema.dropTableIfExists('table_a'))
};

exports.down = async function(knex) {
  await knex.schema.createTable('table_a', t => {
      t.string('col_a')
      t.string('col_b')
      t.string('col_c')
      t.string('col_d')
    })
  
  let rows = await knex('table_b').select('col_a', 'col_b')
  await knex('table_a').insert(rows)
  
  rows = await knex('table_c').select('col_c', 'col_d')
  await knex('table_a').insert(rows)
  
  await knex.schema.dropTableIfExists('table_b')
  await knex.schema.dropTableIfExists('table_c')
};

Source: stackoverflow.com

Similar codes

0 vote328 views1 answer
Error: EROFS: read-only file system, mkdir '/user'
ActionScript
0 vote252 views1 answer
<%@ WebHandler Language="C#" CodeBehind="img.ashx.cs" Class="ReInsuranceSolution.Core.img" %>
ActionScript
14 votes328 views4 answers
Pip install virtualenv windows
ActionScript
3 votes334 views1 answer
TypeError: Cannot read property 'version' of undefined
ActionScript
0 vote267 views1 answer
Bootstrap 5 examples
ActionScript
0 vote327 views1 answer
Microsoft.visualstudio.web.codegeneration.design 3.1.0
ActionScript
44 votes333 views2 answers
Btn-info color code
ActionScript
0 vote264 views1 answer
Apache bench windows 10
ActionScript
0 vote319 views2 answers
How to check if a sequence exists in postgresql
ActionScript
0 vote318 views4 answers
Iis appcmd stop site
ActionScript