the use of this comes in complex queries when passing conditions dynamically,You can concatenate conditions using an " AND " string. Then, instead of counting the number of conditions you're passing in, you place a "WHERE 1=1" at the end of your stock SQL statement and throw on the concatenated conditions.
no need to use 1=1 you can use 0=0 2=2,3=3,5=5 25=25 ......
select * from car_table where 0=0 and value="TOYOTA"
here also you will get the same result like 1=1 condition
because all these case is always true expression
1=1 is alias for true
