/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

10 votes521 views6 answers
Brew start postgres
ActionScript
0 vote399 views1 answer
Solve parse error for .ashx
ActionScript
0 vote399 views1 answer
A = 10
ActionScript
0 vote477 views2 answers
Mount_osxfuse : input/output error
ActionScript
0 vote476 views1 answer
Hello world in actionscript
ActionScript
347 votes466 views7 answers
Javascript remove element from array
ActionScript
0 vote494 views1 answer
Error: EROFS: read-only file system, mkdir '/user'
ActionScript
1 vote474 views1 answer
Rabbitmq docker can access website
ActionScript
0 vote426 views1 answer
Mount_osxfuse: /Users/em/mount_dev: Input/output error
ActionScript
0 vote503 views1 answer
Mass transit logging to seq
ActionScript