Convert Excel to MariaDB

Q: How do I convert Excel to MariaDB?

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

Q: 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.

Q: Which MariaDB types does it use?

Yes and no values become tinyint(1), whole numbers int, decimals decimal(p,s), dates date, dates with a time datetime(6) and text varchar(n). Sizes come from the longest value in each column.

Q: Does it keep leading zeros in MariaDB?

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

Q: Can it load the data into MariaDB without a script?

Yes, with IntoSQL Pro. The desktop app and the command line connect to MariaDB and load the rows straight in, creating the table first.

Q: 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.

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

OutputSheetHeader rowDates

4 rows converted, 10 fixes, none rejected

Your fileSQL10 fixes

The first rows of clientes_2024.xlsx, with each fix marked
Row
5	00127	Peña Muñoz	01234	03/02/2024	sí	1.234,50
6	00128	José Ángel	09870	15/02/2024	no	N/A
7	00129	Zoë Ortíz	44100	29/02/2024	sí	-12,00
8	00130	Ñuño Castañeda	06700	11/03/2024	no	980,75
9
10
11
12
13
14

-- Written by IntoSQL for MariaDB.

SET NAMES utf8mb4;
SET SESSION sql_mode = REPLACE(@@sql_mode, 'NO_BACKSLASH_ESCAPES', '');
START TRANSACTION;

CREATE TABLE clientes_2024 (
    no_cliente varchar(8) NOT NULL COMMENT 'Nº Cliente',
    nombre varchar(16) NOT NULL,
    c_p varchar(8) NOT NULL COMMENT 'C.P.',
    alta date NOT NULL,
    activo tinyint(1) NOT NULL,
    saldo decimal(6,2)
) DEFAULT CHARSET=utf8mb4;

INSERT INTO clientes_2024 (no_cliente, nombre, c_p, alta, activo, saldo) VALUES
('00127', 'Peña Muñoz', '01234', '2024-02-03', TRUE, 1234.50),
('00128', 'José Ángel', '09870', '2024-02-15', FALSE, NULL),
('00129', 'Zoë Ortíz', '44100', '2024-02-29', TRUE, -12.00),
('00130', 'Ñuño Castañeda', '06700', '2024-03-11', FALSE, 980.75);

COMMIT;

Fixes

The header is on row 4; the rows above it were left out.
Row 9 ("TOTAL") is a total, so it was left out.
Column "Nº Cliente" is named no_cliente so MariaDB reads it without quotes.
Column "C.P." is named c_p so MariaDB reads it without quotes.
Leading zeros kept in "Nº Cliente": 00127 stays 00127, stored as text.
Leading zeros kept in "C.P.": 01234 stays 01234, stored as text.
15/02/2024 proves the dates in "Alta" are day-first, so 03/02/2024 is read as 2024‑02‑03.
"Activo" holds yes and no words (sí, no), stored as boolean.
Numbers in "Saldo" use a decimal comma: 1.234,50 is read as 1234.50.
N/A in "Saldo" read as empty (1 of 4 values).

Your file is converted on this computer and never uploaded.

Other samples:

From Excel to MariaDB, column by column

The sample above, clientes_2024.xlsx, as IntoSQL writes it for MariaDB: 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	MariaDB type	In the script
Nº Cliente	00127	no_cliente	varchar(8)	'00127'
Nombre	Peña Muñoz	nombre	varchar(16)	'Peña Muñoz'
C.P.	01234	c_p	varchar(8)	'01234'
Alta	03/02/2024	alta	date	'2024-02-03'
Activo	sí	activo	tinyint(1)	TRUE
Saldo	1.234,50	saldo	decimal(6,2)	1234.50

Load the script into MariaDB

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

From a terminal

$mariadb --default-character-set=utf8mb4 mydb < clientes_2024.mariadb.sql

The script sets utf8mb4 itself; the flag makes the client send it the same way, so accents arrive intact.

From a database tool

In HeidiSQL or DBeaver, open the script and run it.

Without a scriptPro

IntoSQL Pro loads the file straight into MariaDB from the desktop app or the command line, without writing a script.

$intosql load clientes_2024.xlsx --into mariadb://user@localhost/mydb

What to know about Excel files and MariaDB

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 MariaDB

Yes and no values become tinyint(1). Text up to 255 characters is varchar; longer text is text, mediumtext or longtext by size.
The script uses utf8mb4 and sets the SQL mode, so accents, emoji, backslashes and line breaks load as written.
MariaDB's datetime stores no time zone.

How each kind of value is stored in MariaDB

Value	MariaDB
Yes and no	tinyint(1)
Whole numbers	int
Large whole numbers	bigint
Decimals	decimal(p,s)double
Floating-point numbers	double
Dates	date
Times of day	time(6)time
Dates with a time	datetime(6)datetime
Dates with a time and offset	datetime(6)datetime
Text	varchar(n)textmediumtextlongtext

Questions about Excel to MariaDB

Not answered here? Write to us from the contact page and a person replies. Contact page

How do I convert Excel to MariaDB?

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

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 MariaDB types does it use?

Yes and no values become tinyint(1), whole numbers int, decimals decimal(p,s), dates date, dates with a time datetime(6) and text varchar(n). Sizes come from the longest value in each column.

Does it keep leading zeros in MariaDB?

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

Can it load the data into MariaDB without a script?

Yes, with IntoSQL Pro. The desktop app and the command line connect to MariaDB and load the rows straight in, creating the table first.

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.