LIKE operator can be combined with wildcard symbols:

SQL $92$ Standard $($SQL Server, MySQL$,$ etc.$)$: $\_=$ exactly one character; $\%$ E any set of DOS$)$:$?=$ exactly one character; ${?}^{**}=$ any set of one or more characters

$\backslash$table$[[19,\backslash$table$[[$List all visits in which reason$/$diagnosis starts with$],[$diabetes$.]]],[20,\backslash$table$[[$List all visits in which reason$/$diagnosis has monitoring$],[$in it$.]]],[21,\backslash$table$[[$List all invoices for invoice items that have $b$ as the$],[$third letter from the left.$]]],[22,$List all patients where emails are missing.$],[23,$List all patients where emails are not missing.$],[$Aggregate functions: sum $(),$ count $(),$ avg $(0,$ maxd$),$ min $0],[24,$What is the total amount paid by insurance?$],[25,\backslash$table$[[$What is the maximum, minimum, total, and average$],[$invoice amount in our facility?$]]],[26,$How many billing records we have in the billing table.$],[27.,$From how many unique cities are our patients?$],[28,\backslash$table$[[$Calculate the $20$ increased invotee amount and call it$],[$Increasedamoynt Sort by invoice number, and yitip.$],[$Show all.$]]]]$