Which of the following is a valid SQL command?

The choice of "SELECT * FROM table_name" as the valid SQL command is accurate because it adheres to the standard syntax used in SQL for querying data from a database.

In SQL, the SELECT statement is fundamental to retrieving data from one or more tables. When you use "SELECT *", it indicates that you want to select all columns from the specified table, which is commonly done for various data manipulation tasks. The keyword "FROM" is essential as it specifies the source table from which the data should be retrieved.

In contrast, the other options provided do not conform to standard SQL syntax. The first option, which suggests using "FIND records WHERE conditions," uses terminology and a structure that does not exist in SQL. Similarly, "GET FROM table_name" does not comply with any recognized SQL command format since the correct keyword is "SELECT," not "GET." Lastly, "SHOW table_name" is incorrect because while there are commands like "SHOW TABLES" in some SQL implementations, "SHOW" by itself used in this manner is not a standard command for retrieving records.

Thus, "SELECT * FROM table_name" is the only option that correctly demonstrates the syntax and functionality expected in SQL for data retrieval.