如果where子句有一个值,我该如何编写只在where子句中包含条件的sql语句(如果参数有有效值,我只想在where子句中包含field2检查)?SELECT * FROM abc
WHERE if(:param1 has a value that is not null or white space) then field1 = :param1
我有一个SQL查询,其中我需要有条件地向WHERE子句添加一个'AND‘子句。我有一个变量(@Payment),只有在WHERE子句不为null时才需要将其包含在WHERE子句中。lname,city, addressline1, state,zipJOIN addresstable on table1.id = addresstable.addid
WHEREpayment L