between

Get every n-hour data from database with tolerance

由 笑着哭i 提交于 2021-02-11 13:56:41
问题 I have a MySQL database in which I write data every 10 minutes. i.e.: +---------------------+ | datetime | +---------------------+ | 2018-09-03 13:01:49 | | 2018-09-03 12:51:49 | | 2018-09-03 12:41:49 | +---------------------+ In my Python code I want to get just rows which are "exactly" n-hour old, i.e.: +---------------------+ | datetime | +---------------------+ | 2018-09-03 13:01:49 | | 2018-09-03 12:01:49 | | 2018-09-03 11:01:49 | | 2018-09-03 10:01:49 | | 2018-09-03 09:01:49 | | 2018-09

MS Access select between two dates?

由 冷暖自知 提交于 2021-02-05 09:42:30
问题 I have searched, but all results didn't help me to understand. I need to select names of people who are 18-23 years old. So my try was: WHERE ((People.Birth) Between (Now()-Year(18)) And (Now()-Year(23))) What I'm doing wrong? Solution as #some_date# is a bad idea! 回答1: For a true solution, you need to use DateAdd and a function like this: Public Function AgeSimple( _ ByVal datDateOfBirth As Date) _ As Integer ' Returns the difference in full years from datDateOfBirth to current date. ' '

MS Access select between two dates?

由 ◇◆丶佛笑我妖孽 提交于 2021-02-05 09:41:06
问题 I have searched, but all results didn't help me to understand. I need to select names of people who are 18-23 years old. So my try was: WHERE ((People.Birth) Between (Now()-Year(18)) And (Now()-Year(23))) What I'm doing wrong? Solution as #some_date# is a bad idea! 回答1: For a true solution, you need to use DateAdd and a function like this: Public Function AgeSimple( _ ByVal datDateOfBirth As Date) _ As Integer ' Returns the difference in full years from datDateOfBirth to current date. ' '

MS Access select between two dates?

由 廉价感情. 提交于 2021-02-05 09:41:03
问题 I have searched, but all results didn't help me to understand. I need to select names of people who are 18-23 years old. So my try was: WHERE ((People.Birth) Between (Now()-Year(18)) And (Now()-Year(23))) What I'm doing wrong? Solution as #some_date# is a bad idea! 回答1: For a true solution, you need to use DateAdd and a function like this: Public Function AgeSimple( _ ByVal datDateOfBirth As Date) _ As Integer ' Returns the difference in full years from datDateOfBirth to current date. ' '

mongo分页设计和实现

由 眉间皱痕 提交于 2021-01-26 07:37:31
一、思路 通过链式操作和有序集合实现。 二、分页关键实现摘抄 /** * mongo操作 各项目需配置bean mongoCommonTemplate * * @author 漂泊者及其影子 * @date 2016年6月28日 */ public class MongoOperator { private static final Logger log = LoggerFactory.getLogger(MongoOperator.class); protected static MongoTemplate mongoTemplate; static { init(); } public static void init() { if (ApplicationContextHelper.containsBean("mongoCommonTemplate")) { mongoTemplate = (MongoTemplate) ApplicationContextHelper.getBean("mongoCommonTemplate"); log.info("mongoTemplate初始化完毕"); } else { throw new RuntimeException("请在spring中引入mongotemplate,bean名称为mongoCommonTemplate");

Does SQL BETWEEN work with string dates?

由 前提是你 提交于 2020-08-11 06:30:29
问题 I have a large SQL which has to generate some dates to use and compare with a DATETIME column that I also convert to a string for the purposes of this to compare strings with strings. But does BETWEEN work with strings? ie ... AND ((pur.StudyYearID <= @StudyYear AND CONVERT(varchar, pur.StartDate, 112) BETWEEN CONVERT(varchar, GETDATE(), 112) AND CONVERT(varchar, CAST(CAST(YEAR(DATEADD(YEAR, 1, GETDATE())) AS varchar) + '1231' AS DATETIME), 112)) OR (pur.StudyYearID > @StudyYear AND CONVERT

Does SQL BETWEEN work with string dates?

由 孤人 提交于 2020-08-11 06:30:08
问题 I have a large SQL which has to generate some dates to use and compare with a DATETIME column that I also convert to a string for the purposes of this to compare strings with strings. But does BETWEEN work with strings? ie ... AND ((pur.StudyYearID <= @StudyYear AND CONVERT(varchar, pur.StartDate, 112) BETWEEN CONVERT(varchar, GETDATE(), 112) AND CONVERT(varchar, CAST(CAST(YEAR(DATEADD(YEAR, 1, GETDATE())) AS varchar) + '1231' AS DATETIME), 112)) OR (pur.StudyYearID > @StudyYear AND CONVERT

SQL Using Between for two tables

由 旧城冷巷雨未停 提交于 2020-02-25 04:25:10
问题 Hi I want to fetch data from a Table based on values that lie between two columns of another table, below SQL shoulde explain my purpose: SELECT * FROM TABLE 1 WHERE 1.FIELD1 BETWEEN (SELECT 2.RANGE_FROM FROM TABLE 2) AND (SELECT 2.RANGE_TO FROM TABLE 2) This is not working as I am getting error: Error: SQL0811N The result of a scalar fullselect, SELECT INTO statement, or VALUES INTO statement is more than one row. SQLSTATE=21000 (State:21000, Native Code: FFFFFCD5) This is obvious as both

mysql datetime field with index get a range 'like' vs. 'between and' performance

由 谁说我不能喝 提交于 2020-02-20 07:12:11
问题 I just find mysql can query datetime using like: like '2013-06-12%' I think it can not use the index. I Google it, but can not find such subject directly. So I have a test using a table with 3308614 records. The first SQL: SELECT * FROM subscription t WHERE DATE(t.active_time) = '2013-06-30'; All we know this SQL can not use the index and it takes 4 seconds to get the result. The second SQL: SELECT * FROM subscription t WHERE t.active_time LIKE '2013-06-30%'; I don't know if it can use the

trying to count mysql data between time1 and time2

由 柔情痞子 提交于 2020-02-07 00:38:31
问题 I have a database table 'email_log' which would be filled with information as: user, subject and opened (as datetime) What I need is a new query from which I can see how many rows contain the column 'opened' between 08:00 and 09:00 . What I had didn't work: SELECT count(*) as count FROM email_log WHERE opened BETWEEN '00:08:00' AND '00:09:00'; Does anyone know the trick? 回答1: You might need to include the entire format for the datetime - since it's got both a date and a time. See: mysql: get
订阅 between