/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 vote280 views1 answer
From sys import stdin
ActionScript
4 votes208 views1 answer
Media queries for all devices
ActionScript
0 vote246 views2 answers
When o am opening my bs modal all background content is shifting a little left everytime
ActionScript
1 vote298 views2 answers
How to disable foreign key constraint in postgresql
ActionScript
0 vote252 views1 answer
Bs modal is working but not visible
ActionScript
0 vote267 views1 answer
Application insights powershell
ActionScript
1 vote285 views1 answer
Rabbitmq docker can access website
ActionScript
73 votes280 views6 answers
Loop array js
ActionScript
0 vote273 views1 answer
Dynamic computed property vue
ActionScript
0 vote241 views1 answer
Unable to locate executable file 'dotnet'
ActionScript