[DOCS] Update incomplete SQL doc pages

[willvo2004]

Closes #3268

Still WIP. Awaiting approval for current document updates

[codspeed-hq[bot]]

CodSpeed Performance Report

Merging #3298 will degrade performances by 46.37%

_{Comparing willvo2004:issuedoc1 (96c0f4a) with main (711e862)}

Summary

❌ 3 regressions ✅ 14 untouched benchmarks

:warning: Please fix the performance issues or acknowledge them on CodSpeed.

Benchmarks breakdown

	Benchmark	main	willvo2004:issuedoc1	Change
❌	test_count[1 Small File]	3.6 ms	4 ms	-11.31%
❌	test_iter_rows_first_row[100 Small Files]	269 ms	380.8 ms	-29.36%
❌	test_show[100 Small Files]	22.3 ms	41.5 ms	-46.37%

[willvo2004]

Looking into issue with search page brought up in original issue. Maybe can be opened in seperate issue?