How i will convert PDF tables to .csv file as tabula work’s.
libreoffice --convert-to csv a1.pdf
not work’s at all, or any other why than i can switch between multiple formats and then came to csv
At first: There is no general way to solve this. A pdf can contain no letter at all, but a scanned image. Then you need an OCR-software to create text again.
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Actually pdf is more a programming language to position objects on pages. They do not necessarily preserve the sequence of text or tables. But there is specialised software for extracting text out of pdf available.
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A pdf may be opened in Draw, is therefore interpreted as a sequence of instructions to draw something, maybe letters. You can do some little changes there but it is not the right tool to extract tables.
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LibreOffice can convert its output to pdf, as well as printing the content. But this is usually not easily reverted. Try to get your paper-printed page back into Writer or Calc. A similiar way has to be done for reading a pdf back.
I support everything said above, look for a better way. I forked https://pdf_statement_reader which uses tabula.