Export PostgreSQL query to HTML using dynamic filename with current date

Shiji Pan

1 year ago

Want to export data from PostgreSQL query result to HTML using current date as file name?

Try Withdata DBToFile, a PostgreSQL to HTML converter for Windows, Linux, and macOS, Export PostgreSQL data to HTML, Easy and Fast.

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Export PostgreSQL query result to HTML file using dynamic filename with date and time

Login to PostgreSQL -> Enter PostgreSQL SQL statement -> Set HTML filename template including date -> Export PostgreSQL query to HTML using current date as file name

“Export From Query” for “HTML to PostgreSQL“.

Select HTML file type.

1. Enter PostgreSQL SQL query.

2. Set HTML file options. Enter filename template, including date, #yyyy# is for current year, #mm# month, #dd# day, #hh# hour, #mi# minute, #ss# second.

3. Set rows options.

4. Export PostgreSQL query results to HTML file. Dynamically created HTML file name using present system time.

After exporting, you can view output HTML files.

PostgreSQL → HTML reference

Type mapping

Value kind	in PostgreSQL	in HTML
Int	`integer`	`<td>1234</td>`
Bigint	`bigint`	`<td>9007199254740993</td>`
Decimal	`numeric(p,s)`	`<td>1234.56</td>`
Float	`double precision`	`<td>1.234e+10</td>`
Text	`varchar(n)`	`<td>text</td>`
Long text	`text`	`<td>multi-line text</td> (entities for & <)`
Date	`date`	`<td>2026-09-18</td>`
Datetime	`timestamp`	`<td>2026-09-18 14:30:00</td>`
Binary	`bytea`	`not representable in a cell`
Boolean	`boolean`	`<td>true</td>`
JSON	`jsonb`	`<td>{"a":1}</td> (quotes escaped)`

Dialect differences

PostgreSQL is a database server and HTML is a file format, so the gap is wider than a dialect difference - the rows below are where values and structure stop lining up.

Property	in PostgreSQL	in HTML
port	`5432`	`—`
identifiers	`"double quotes"`	`Attribute values in quotes; entities for reserved characters`
row limit	`LIMIT n`	`—`
dates	`timestamp, timestamptz, date, time`	`Whatever text was rendered`
long text	`TEXT`	`—`
binary	`BYTEA`	`data: URIs inside src attributes`
separator	`—`	`Tags, not delimiters`
encoding	`—`	`Declared in a meta charset tag or the HTTP header`
typing	`—`	`None`
shape	`Tables of rows and columns`	`Free form; tables are row/column structures inside markup`
ceiling	`—`	`No formal limit`

Command line

Side	Command
PostgreSQL	`pg_dump or COPY ... TO`
PostgreSQL (load)	`COPY ... FROM`

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