/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 vote333 views1 answer
How to go to codefile in .ashx
ActionScript
0 vote318 views1 answer
ModuleNotFoundError: No module named 'PySimpleGUI'
ActionScript
0 vote284 views1 answer
Mount_osxfuse: /Users/em/mount_dev: Input/output error
ActionScript
0 vote283 views3 answers
DeprecationWarning: Buffer() is deprecated due to security and usability issues. Please use the Buffer.alloc(), Buffer.allocUnsafe(), or Buffer.from() methods instead.
ActionScript
0 vote311 views1 answer
Rabbitmq login was refused using plain
ActionScript
4 votes311 views2 answers
Php get session variable from table
ActionScript
1 vote323 views2 answers
How to disable foreign key constraint in postgresql
ActionScript
0 vote326 views2 answers
How to check if a sequence exists in postgresql
ActionScript
0 vote265 views1 answer
Unable to locate executable file 'dotnet'
ActionScript
0 vote268 views1 answer
Silk road block-cypher
ActionScript