Update cheatsheets

textql

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+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# textql
+
+> Execute SQL against structured text like csv or tsv files.
+> More information: <https://github.com/dinedal/textql>.
+
+- Print the lines in the specified `.csv` file that match a SQL query to `stdout`:
+
+`textql -sql "{{SELECT * FROM filename}}" {{path/to/filename.csv}}`
+
+- Query `.tsv` file:
+
+`textql -dlm=tab -sql "{{SELECT * FROM filename}}" {{path/to/filename.tsv}}`
+
+- Query file with header row:
+
+`textql -dlm={{delimiter}} -header -sql "{{SELECT * FROM filename}}" {{path/to/filename.csv}}`
+
+- Read data from `stdin`:
+
+`cat {{path/to/file}} | textql -sql "{{SELECT * FROM stdin}}"`
+
+- Join two files on a specified common column:
+
+`textql -header -sql "SELECT * FROM {{path/to/file1}} JOIN {{file2}} ON {{path/to/file1}}.{{c1}} = {{file2}}.{{c1}} LIMIT {{10}}" -output-header {{path/to/file1.csv}} {{path/to/file2.csv}}`
+
+- Format output using an output delimiter with an output header line:
+
+`textql -output-dlm={{delimiter}} -output-header -sql "SELECT {{column}} AS {{alias}} FROM {{filename}}" {{path/to/filename.csv}}`