如果满足某一条件,如何更改列及其列名的输出值?假设我有表A,它有3列id,问候语,姓名,姓氏,性别select * from Aselectsalutation to Mr. else, set salutation to Ms. but then change the salutation into alias namePrefix
如何
我需要接收id_word字段,即使没有子行.但问题的一部分是,我已经过滤了WHERE语句中子表的一个列。word :id_word,lang,word
SELECTword_translate.id_translate AS id_translate
FROM word LEFT JOIN word_tran
对于学校,我需要从所有这些值的平均值中减去表中特定条目子集的平均值:SELECT AVG(gehalt) FROM mitarbeiter WHERE personalnummer IN (SELECT personalnummer FROM zertifiziert)SELECT AVG(gehalt) FROM mitarbeiter
个别地,这些陈述是有效的,但我试图减去它们SELECT (SELECT A
如何将彼此的子查询相加,并将其显示为一列。我测试了如何在SELECT语句中添加子查询,但是,我意识到我不知道如何在它们之间求和,然后将它们添加到FROM语句中,看看我是否可以在SELECT语句中添加它们,但它不能工作。这样做的目的是为每个CodUbic用A减去B。中选择SUM(Monto),从dbo.SAFACT选择TipoFac IN (‘A’)为SumFacA,从dbo.SAFACT WHERE
我的第一个选择是:
SELECT u.id FROM users u INNER JOIN users_languages ul ON u.id=ul.id_user AND ul.id_languageSELECT id FROM users u INNER JOIN users_languages ul_1 ON u.id=ul_1.id_user AND ul_1.id_language = 1
Cursor cursor = db.rawQuery("SELECT id,lastname,status FROM people WHERE " + "id = "+ IncomingiD +"openining peopleandroid.database.sqlite.SQLiteException: near "FROM": syntax error: , while compiling: SELECT