How to create index in firebird for improvement of select query
问题 I am newbie in using firebird. I have 3 tables. for T_TABLE1 the structure is shown below: for T_TABLE2 the structure is shown below: and for T_TABLE3 the structure is like this: the primary key is the ID from T_TABLE1 to TBL1_ID in T_TABEL2 and TBL1_ID in T_TABLE3 . How can I select data join with that 3 tables and I want to use index for best select query but I don't know how to create index because I am newbie in using firebird and I want to learn more in using firebird. Hope my