Question

我有一个表，上面有生日，我要选择未来30天内的所有生日。

情况是，所有的生日都以1999-09-15的格式书写，这意味着即使我尝试选择接下来的30天，也不会出现生日，因为那是1999年。

我正在运行Microsoft Server 2016。

SELECT * from dbo.EMPLOYEES
WHERE DATE <= DATEADD(day, +30,GETDATE()) 
and   DATE >= getdate()
order by "DATE"

Answer 1

要获取出生日期，我们只需要在日期和月份上工作，而不需要在年份上工作。这就是为什么我们无法获得2个日期之间的Where日期的原因。

SELECT 
  dateofbirth_c AS BIRTHDAY
 ,FLOOR(DATEDIFF(dd,EMP.dateofbirth_c,GETDATE()) / 365.25) AS AGE_NOW
 ,FLOOR(DATEDIFF(dd,EMP.dateofbirth_c,GETDATE()+30) / 365.25) AS AGE_30_Days_FROM_NOW
FROM 
  Employees EMP
WHERE 1 = (FLOOR(DATEDIFF(dd,EMP.dateofbirth_c,GETDATE()+30) / 365.25))
          -
          (FLOOR(DATEDIFF(dd,EMP.dateofbirth_c,GETDATE()) / 365.25))

Answer 2

尝试以下方法；检查月份和日期，因为年份与生日年份不匹配，这就是为什么您没有任何数据的原因。

SELECT *
from dbo.EMPLOYEES
WHERE month(DATE)>= month(GETDATE()) 
and  day(DATE) >= day (getdate()) and day(DATE) < = day( getdate()) + 30
order by "DATE"

Answer 3

尝试

SELECT * 
FROM dbo.EMPLOYEES
WHERE  DATEFROMPARTS(YEAR(GETDATE()) , MONTH(Date), DAY(Date)) >= GETDATE()
       AND  DATEFROMPARTS(YEAR(GETDATE()) , MONTH(Date), DAY(Date)) <= DATEADD(day, +30, GETDATE())
ORDER BY  Date

Answer 4

如果您希望获得适用于leap年等的准确结果，则：

private static DbManager buildDatabaseInstance(Context context) {
    return Room.databaseBuilder(context,
            DbManager.class,
            DB_NAME)
            .addMigrations(MIGRATION_31_32, MIGRATION_33_35, MIGRATION_35_36, MIGRATION_36_37,MIGRATION_37_38)
            .allowMainThreadQueries().build();
}

static final Migration MIGRATION_31_32 = new Migration(32, 33) {
    @Override
    public void migrate(SupportSQLiteDatabase database) {
        database.execSQL("ALTER TABLE 'Orders' " + " ADD COLUMN 'lon' REAL");
        database.execSQL("ALTER TABLE 'Orders' " + " ADD COLUMN 'lat' REAL");
    }
};
static final Migration MIGRATION_33_35 = new Migration(33, 35) {
    @Override
    public void migrate(SupportSQLiteDatabase database) {
        database.execSQL("ALTER TABLE 'Orders' " + " ADD COLUMN 'lats' REAL  not null DEFAULT  0");

    }
};

static final Migration MIGRATION_35_36 = new Migration(35, 36) {
    @Override
    public void migrate(SupportSQLiteDatabase database) {
        database.execSQL("ALTER TABLE 'change_job_status' " + " ADD COLUMN 'login' text");

    }
};

static final Migration MIGRATION_36_37 = new Migration(36, 37) {
    @Override
    public void migrate(SupportSQLiteDatabase database) {
        database.execSQL("ALTER TABLE 'Orders' " + " ADD COLUMN 'category_nr' INTEGER  not null DEFAULT  0");
    }
};
static final Migration MIGRATION_37_38 = new Migration(37, 38) {
    @Override
    public void migrate(SupportSQLiteDatabase database) {
        database.execSQL("ALTER TABLE 'Orders' " + " ADD COLUMN 'status_date' text");
    }
};

我如何选择未来30天的生日

4 个答案: