What is this an example of$?$

Example: SELECT $*$

FROM TableName $--$select everything

$$ Logic: $$a$=$a$$

ex$)$ SELECT $*$

FROM TableName

WHERE $$a$=$a$$

$$ MULTI STATEMENTS: S$1$; S$2$

ex$)$ SELECT $*$

FROM table;

DROP TABLE TableName;

$(5$points$)$

SQL Inflation

SQL Inspection

SQL Injection

SQL Modification