Batch convert Excel files to SQL files

Shiji Pan

1 year ago

Want to batch convert Excel files to SQL files?

Try Withdata Data File Converter, a desktop Excel to SQL converter for Windows, MacOS, and Linux, Batch convert Excel to SQL, Easy and Fast.

Can run in GUI mode, Step by Step, just a few mouse clicks.
Can run in Command line, for Scheduled Tasks and Streams.
Convert files locally and privately, avoid uploading large Excel file(s) to online services.
Support Windows, Linux, and macOS.

Click “Start a New Convert” at task dialog.

then show the wizard.

Select From “Files” “Excel” To “Files” “SQL”.

And config the first source Excel file.

List source Excel files.

After converting, you can view output SQL files.

EXCEL → SQL reference

Value kind	in EXCEL	in SQL
Int	`1234 (a real numeric cell)`	`INT`
Bigint	`9007199254740993 (exact only while the cell stays text)`	`BIGINT`
Decimal	`1234.56 (numeric cell, format controls the displayed decimals)`	`DECIMAL(p,s)`
Float	`1.234E+10 (numeric cell)`	`DOUBLE PRECISION`
Text	`text cell; leading zeros survive only if the column is text`	`VARCHAR(n)`
Long text	`text cell; wraps inside the cell rather than the row`	`TEXT / CLOB`
Date	`a serial number plus a date cell format`	`DATE`
Datetime	`a serial number plus a date-time cell format`	`TIMESTAMP`
Binary	`not representable as data`	`BLOB / BYTEA`
Boolean	`TRUE / FALSE (a real boolean cell)`	`BOOLEAN / SMALLINT`
JSON	`a text cell; the quotes are part of the value`	`JSON / TEXT`

Both EXCEL and SQL are file formats, so what differs below is how each one chooses to represent a value.

Property	in EXCEL	in SQL
identifiers	`Not applicable; a cell holds exactly one value`	`Two competing conventions: single-quoted literals and diale...`
dates	`Stored as a serial number; only the cell format makes it lo...`	`Depends on the dialect: DATE literals, TO_DATE(), or plain ...`
binary	`Only as text or an embedded object, not as a data column`	`Dialect-specific: X-quoted literal, 0x hex, or decode()`
separator	`Cells, not delimiters`	`Statement terminators (;)`
encoding	`UTF-8 internally, declared in the package`	`No declaration`
typing	`Real cell types: text, number, date, boolean, error`	`Types belong to the target database, and they differ betwee...`
shape	`Multiple sheets, each a flat grid`	`Statements; a dump usually means CREATE TABLE plus INSERT rows`
ceiling	`1,048,576 rows x 16,384 columns per sheet; 255 sheets per w...`	`No formal limit, but a single INSERT statement has to fit i...`

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