Google-sheets – Can’t find script insert option in Google Sheets

You could always create the column in one sheet, and copy-paste it to the other sheets, one sheet at the time. But I guess that's what you're trying to avoid.

It is possible to do this with a Google Apps Script. The following script adds a menu in a spreadsheet, which allows you to insert or remove a column on all sheets.

function addColumnOnAllSheets() {
  var spreadsheet = SpreadsheetApp.getActiveSpreadsheet();
  var colIdxStr = Browser.inputBox("Insert column right of column no");
  if (colIdxStr == 'cancel') {
    return;
  }
  var colIdx = parseInt(colIdxStr);
  if (colIdx == NaN) {
    Browser.msgBox("You must enter a number or 'cancel'");
    return;
  }
  var sheets = spreadsheet.getSheets();
  for (var i = 0; i < sheets.length; i++) {
    var sheet = sheets[i];
    sheet.insertColumnAfter(colIdx);
  }
}

function removeColumnOnAllSheets() {
  var spreadsheet = SpreadsheetApp.getActiveSpreadsheet();
  var colIdxStr = Browser.inputBox("Remove column no");
  if (colIdxStr == 'cancel') {
    return;
  }
  var colIdx = parseInt(colIdxStr);
  if (colIdx == NaN) {
    Browser.msgBox("You must enter a number or 'cancel'");
    return;
  }
  var sheets = spreadsheet.getSheets();
  for (var i = 0; i < sheets.length; i++) {
    var sheet = sheets[i];
    sheet.deleteColumn(colIdx);
  }
}

function onOpen() {
  var sheet = SpreadsheetApp.getActiveSpreadsheet();
  var entries = [
    {name: "Add column on all sheets", functionName: "addColumnOnAllSheets"}, 
    {name: 'Remove column on all sheets', functionName: 'removeColumnOnAllSheets'}
  ];
  sheet.addMenu("Columns", entries);
}

To install this script in your own spreadsheet, click Tools -> Script editor, and paste the code into the script editor. Save the script, and reload the spreadsheet in order to show the menu.

I have set up an example spreadsheet to demonstrate the script.

My guess is your 1st one is the old Google Sheets and your 2nd one is new Google Sheets, where the Script gallery has been moved to Add-ons and renamed Add-on store.

This is the answer to the question of which this has been deemed a duplicate:

The Scripts Gallery menu item will not appear in new spreadsheets if you have opted in to the new Google sheets (@Vidar S. Ramdal).