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法学研究选择今天日期介于两列日期之间的 MySQL 行？
要选择 MySQL 行，条件是今天的日期在两个日期列之间，你需要使用 AND 运算符。语法如下所示
SELECT *FROM yourTableName WHERE yourDateColumnName1 <=’yourDateValue’ AND yourDateColumnName2 >= ‘’yourDateValue’;
为了了解上述语法，让我们创建一个表。用于创建表的查询如下所示
mysql> create table selectDates -> ( -> Id int NOT NULL AUTO_INCREMENT, -> StartingDate date, -> EndingDate date, -> PRIMARY KEY(Id) -> ); Query OK, 0 rows affected (0.80 sec)
现在你可以使用插入式命令在表中插入一些记录。查询如下所示
mysql> insert into selectDates(StartingDate,EndingDate) values('2019-01-11','2019-01-23');
Query OK, 1 row affected (0.17 sec)
mysql> insert into selectDates(StartingDate,EndingDate) values('2019-01-10','2019-01-23');
Query OK, 1 row affected (0.17 sec)
mysql> insert into selectDates(StartingDate,EndingDate) values('2019-01-30','2019-01-30');
Query OK, 1 row affected (0.12 sec)
mysql> insert into selectDates(StartingDate,EndingDate) values('2019-10-14','2019-10-28');
Query OK, 1 row affected (0.17 sec)
mysql> insert into selectDates(StartingDate,EndingDate) values('2019-10-14','2019-10-20');
Query OK, 1 row affected (0.19 sec)
mysql> insert into selectDates(StartingDate,EndingDate) values('2019-11-17','2019-11-19');
Query OK, 1 row affected (0.52 sec)
mysql> insert into selectDates(StartingDate,EndingDate) values('2019-12-21','2019-12-31');
Query OK, 1 row affected (0.19 sec)
mysql> insert into selectDates(StartingDate,EndingDate) values('2019-01-06','2019-01-21');
Query OK, 1 row affected (0.16 sec)
mysql> insert into selectDates(StartingDate,EndingDate) values('2019-01-07','2019-01-17');
Query OK, 1 row affected (0.18 sec)使用 select 语句从表中显示所有记录。查询如下所示
mysql> select *from selectDates;
以下是输出
+----+--------------+------------+ | Id | StartingDate | EndingDate | +----+--------------+------------+ | 1 | 2019-01-11 | 2019-01-23 | | 2 | 2019-01-10 | 2019-01-23 | | 3 | 2019-01-30 | 2019-01-30 | | 4 | 2019-10-14 | 2019-10-28 | | 5 | 2019-10-14 | 2019-10-20 | | 6 | 2019-11-17 | 2019-11-19 | | 7 | 2019-12-21 | 2019-12-31 | | 8 | 2019-01-06 | 2019-01-21 | | 9 | 2019-01-07 | 2019-01-17 | +----+--------------+------------+ 9 rows in set (0.00 sec)
以下是用于选择介于两个日期列之间的今天的日期的查询
select *from selectDates where StartingDate <='2019-01-10' AND EndingDate >='2019-01-10';
以下是输出
+----+--------------+------------+ | Id | StartingDate | EndingDate | +----+--------------+------------+ | 2 | 2019-01-10 | 2019-01-23 | | 8 | 2019-01-06 | 2019-01-21 | | 9 | 2019-01-07 | 2019-01-17 | +----+--------------+------------+ 3 rows in set (0.00 sec)
更新于: 2019-07-30
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