---
title: "Convert Excel to Oracle"
description: "Convert Excel files to SQL for Oracle in your browser: a CREATE TABLE with typed columns, then INSERT statements. Free, and your file is never uploaded."
canonical: https://intosql.com/excel-to-oracle
last_updated: 2026-10-15
---

# Convert Excel to Oracle

Drop your Excel file to get a Oracle script with CREATE TABLE and INSERT statements. Each column gets a type, and every fix is listed with its row and column.

## From Excel to Oracle, column by column

The sample above, clientes_2024.xlsx, as IntoSQL writes it for Oracle: what each column holds in the file, the type it gets and how its first value lands in the script.

| In the file | First value | Column | Oracle type | In the script |
| --- | --- | --- | --- | --- |
| Nº Cliente | `00127` | `no_cliente` | `VARCHAR2(8 CHAR)` | `'00127'` |
| Nombre | `Peña Muñoz` | `nombre` | `VARCHAR2(16 CHAR)` | `'Peña Muñoz'` |
| C.P. | `01234` | `c_p` | `VARCHAR2(8 CHAR)` | `'01234'` |
| Alta | `03/02/2024` | `alta` | `DATE` | `DATE '2024-02-03'` |
| Activo | `sí` | `activo` | `NUMBER(1)` | `1` |
| Saldo | `1.234,50` | `saldo` | `NUMBER(6,2)` | `1234.50` |

## Load the script into Oracle

The download is a plain .sql file. Run it with Oracle's own tools.

### Oracle

```shell
sqlplus user@//localhost/mydb @clientes_2024.oracle.sql
```

The script turns off substitution variables (SET DEFINE OFF), so an ampersand in your data stays an ampersand. In SQL Developer, open the script and choose Run Script (F5).

## What IntoSQL reads in Excel files

- The header row is found even when titles or notes sit above it, and a totals row at the end is left out.
- Dates stored as Excel serial numbers become real dates, in both the 1900 and the 1904 date systems.
- Codes with leading zeros, like 00127, stay text. When a workbook has several sheets, you pick the sheet.

## What to know about Oracle

- Yes and no values become NUMBER(1), holding 1 or 0, which every Oracle version accepts.
- Text is VARCHAR2 with a length in characters; over 4000 bytes it becomes CLOB. Oracle stores empty text as NULL.
- Rows are inserted with INSERT ALL, and long values are split so SQL*Plus accepts them.

### How each kind of value is stored in Oracle

| Value | Oracle |
| --- | --- |
| Yes and no | `NUMBER(1)` |
| Whole numbers | `NUMBER(10)` |
| Large whole numbers | `NUMBER(19)` |
| Decimals | `NUMBER(p,s)` |
| Floating-point numbers | `BINARY_DOUBLE` |
| Dates | `DATE` |
| Times of day | `INTERVAL DAY(0) TO SECOND` |
| Dates with a time | `TIMESTAMP` |
| Dates with a time and offset | `TIMESTAMP WITH TIME ZONE` |
| Text | `VARCHAR2(n CHAR) · CLOB` |

## Questions about Excel to Oracle

### How do I convert Excel to Oracle?

Drop your file on the converter at the top of this page. It finds the header, reads every value and writes the Oracle script, listing each fix it made. Download the script and run it with SQL*Plus.

### Which sheet of the workbook is converted?

The first visible sheet. When a workbook has more than one, a Sheet option appears, so you can pick another.

### Which Oracle types does it use?

Yes and no values become NUMBER(1), whole numbers NUMBER(10), decimals NUMBER(p,s), dates DATE, dates with a time TIMESTAMP and text VARCHAR2(n CHAR). Sizes come from the longest value in each column.

### Does it keep leading zeros in Oracle?

Yes. A code such as 00127 stays text, so Oracle stores it as VARCHAR2(8 CHAR) and the script writes it as '00127'.

### Can it load the data into Oracle without a script?

No. Download the script and run it with SQL*Plus. Loading without a script works for PostgreSQL, MySQL, MariaDB and SQLite, from the desktop app or the command line.

### How big can the Excel file be?

In the browser, a workbook is read whole, so the limit is the memory the browser gives this page. The desktop app and the command line take workbooks of any size; on an Apple M4 laptop the command line converts a 117 MB workbook of a million rows in about a second.

## Excel into other databases

- [Convert Excel to SQL](https://intosql.com/excel-to-sql)
- [Convert Excel to PostgreSQL](https://intosql.com/excel-to-postgresql)
- [Convert Excel to MySQL](https://intosql.com/excel-to-mysql)
- [Convert Excel to MariaDB](https://intosql.com/excel-to-mariadb)
- [Convert Excel to SQLite](https://intosql.com/excel-to-sqlite)
- [Convert Excel to SQL Server](https://intosql.com/excel-to-sql-server)

## Other files into Oracle

- [Convert CSV to Oracle](https://intosql.com/csv-to-oracle)
- [Convert JSON to Oracle](https://intosql.com/json-to-oracle)