list_TN_mysql: Functions to link to MySQL database and extract column name
In biostatUniBS/RDataXMan: Data Extraction Management

Link to MySQL database and extract column names of table in database.

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list_TN_mysql(database, username, password)

list_TN_flat(wkdir, research.folder, database)

`database`	Name of database. Should be either `private` or `public` for flat tables, indicating whether data is stored in `public_data` or `research/[research folder]/private_data`, or the actual name of database if extracting data from a database.
`username`	User name for accessing database if `data.type` is not `flat`. Default is `NA` for flat tables.
`password`	Password for accessing database if `data.type` is not `flat`. Default is `NA` for flat tables.
`wkdir`	The path to working directory. See `initWkdir` for details on a working directory.
`research.folder`	The name of research folder. See `initResearchFolder` for details on a research folder.