How can I escape string with a regex?

Question

How can I escape a string to improve queries in MySQL.

I need add ` (crass) in names of tables with name of fields separatly by dot.

But sometimes exists more than one

Examples of my strings

How write a regex to do this

Table.field Table . field // <-- need this

FORMAT(Table.field + Table2.field2 - Table3.field3, 2)
FORMAT(`Table`.`field` + `Table2`.`field2` - `Table3`.`field3`, 2) // <-- need this

DATE(Table.field)
DATE(`Table`.`field`) // <-- need this

Table.field > Table2.field
`Table`.`field` > `Table2`.`field` // <-- need this

Answer 1

查找：（\\ w +）。（\\ w +）...替换：$ 1. $ 2 – Tim Biegeleisen