PHP进行SQL查询以指示哪些行包含特定列中的文本？

I have a table that is reading from an SQL database full of job numbers and the relevant customers and machine order. I also have a "notes" column in the "operations" table which will sometimes contain text that is entered by others. What I need is to display some sort of indication that text has been entered into the notes column for the specific jobID and operation.I have a table that is reading from an SQL data