找到 4219 篇文章,关于 MySQLi
113 次查看
以下是语法 -select * from yourTableName order by ( yourColumnName> now()) desc, (case when yourColumnName > now() then yourColumnName end) , yourColumnName desc limit 1;让我们先创建一个表 -mysql> create table DemoTable1454 -> ( -> ShippingDate date -> ); Query OK, 0 rows affected (0.59 sec)使用 insert 命令在表中插入一些记录 -mysql> insert into DemoTable1454 values('2019-10-01'); Query OK, 1 row affected (0.22 sec) mysql> insert into DemoTable1454 values('2019-10-03'); Query OK, 1 row affected (0.25 sec) mysql> insert into DemoTable1454 values('2019-10-05'); Query OK, 1 row affected (0.25 sec) mysql> insert ... 阅读更多
159 次查看
让我们先创建一个表 -mysql> create table DemoTable1453 -> ( -> CustomerId int, -> CustomerReviewNumber int -> ); Query OK, 0 rows affected (0.58 sec)使用 insert 命令在表中插入一些记录 -mysql> insert into DemoTable1453 values(10, 4); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable1453 values(10, 4); Query OK, 1 row affected (0.08 sec) mysql> insert into DemoTable1453 values(11, 5); Query OK, 1 row affected (0.10 sec) mysql> insert into DemoTable1453 values(11, 5); Query OK, 1 row affected (0.07 sec) mysql> insert into DemoTable1453 values(11, 5); Query OK, 1 ... 阅读更多
640 次查看
让我们先创建一个表 -mysql> create table DemoTable1452 -> ( -> FavouriteColor varchar(50) -> ); Query OK, 0 rows affected (2.42 sec)使用 insert 命令在表中插入一些记录 -mysql> insert into DemoTable1452 values('Red'); Query OK, 1 row affected (0.31 sec) mysql> insert into DemoTable1452 values('Yellow'); Query OK, 1 row affected (0.20 sec) mysql> insert into DemoTable1452 values('Yellow'); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable1452 values('Yellow'); Query OK, 1 row affected (0.23 sec) mysql> insert into DemoTable1452 values('Blue'); Query OK, 1 row affected (0.42 sec) mysql> insert into DemoTable1452 values('Blue'); ... 阅读更多
244 次查看
让我们先创建一个表 -mysql> create table DemoTable1451 -> ( -> JoiningDate date -> ); Query OK, 0 rows affected (0.52 sec)使用 insert 命令在表中插入一些记录 -mysql> insert into DemoTable1451 values('2019-07-21'); Query OK, 1 row affected (0.07 sec) mysql> insert into DemoTable1451 values('2018-01-31'); Query OK, 1 row affected (0.09 sec) mysql> insert into DemoTable1451 values('2017-06-01'); Query OK, 1 row affected (0.20 sec)使用 select 语句显示表中的所有记录 -mysql> select * from DemoTable1451;这将产生以下输出 -+-------------+ | JoiningDate | +-------------+ | 2019-07-21 | | 2018-01-31 | ... 阅读更多
112 次查看
假设我们正在查找与当前日期匹配的记录。由于我们希望重复的匹配记录仅显示一次,因此使用 LIMIT。例如,当前日期为 -2019-10-02让我们先创建一个表 -mysql> create table DemoTable1450 -> ( -> DueDate date -> ); Query OK, 0 rows affected (0.63 sec)使用 insert 命令在表中插入一些记录 -mysql> insert into DemoTable1450 values('2019-09-30'); Query OK, 1 row affected (0.10 sec) mysql> insert into DemoTable1450 values('2019-10-02'); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable1450 values('2019-10-02'); Query OK, 1 row affected (0.10 sec) mysql> insert into ... 阅读更多
156 次查看
让我们先创建一个表 -mysql> create table DemoTable1449 -> ( -> PlayerId int NOT NULL AUTO_INCREMENT PRIMARY KEY, -> PlayerScore int -> ); Query OK, 0 rows affected (0.69 sec)使用 insert 命令在表中插入一些记录 -mysql> insert into DemoTable1449(PlayerScore) values(1040); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable1449(PlayerScore) values(1450); Query OK, 1 row affected (0.34 sec) mysql> insert into DemoTable1449(PlayerScore) values(1890); Query OK, 1 row affected (0.72 sec) mysql> insert into DemoTable1449(PlayerScore) values(1650); Query OK, 1 row affected (0.25 sec)使用 select 语句显示表中的所有记录 ... 阅读更多
759 次查看
让我们先创建一个表 -mysql> create table DemoTable1448 -> ( -> StartDate date, -> EndDate date -> ); Query OK, 0 rows affected (0.46 sec)使用 insert 命令在表中插入一些记录 -mysql> insert into DemoTable1448 values('2019-01-21', '2019-03-22'); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable1448 values('2019-04-05', '2019-10-10'); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable1448 values('2019-10-01', '2019-10-29'); Query OK, 1 row affected (0.11 sec) mysql> insert into DemoTable1448 values('2018-12-31', '2019-12-31'); Query OK, 1 row affected (0.12 sec)使用 select 语句显示表中的所有记录 -mysql> ... 阅读更多
133 次查看
为此,您可以在 MySQL 中使用 REGEXP。假设您想要任何逗号分隔值为 90 的行记录。为此,请使用正则表达式。让我们先创建一个表 -mysql> create table DemoTable1447 -> ( -> Value varchar(100) -> ); Query OK, 0 rows affected (0.58 sec)使用 insert 命令在表中插入一些记录 -mysql> insert into DemoTable1447 values('19, 58, 90, 56'); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable1447 values('56, 89, 99, 100'); Query OK, 1 row affected (0.21 sec) mysql> insert into DemoTable1447 values('75, 76, 65, ... 阅读更多
288 次查看
要查找差异,请使用 DATEDIFF() 方法。让我们先创建一个表 -mysql> create table DemoTable1446 -> ( -> DueDate date -> ); Query OK, 0 rows affected (1.42 sec)使用 insert 命令在表中插入一些记录 -mysql> insert into DemoTable1446 values('2019-01-21'); Query OK, 1 row affected (0.69 sec) mysql> insert into DemoTable1446 values('2019-02-01'); Query OK, 1 row affected (0.44 sec) mysql> insert into DemoTable1446 values('2019-09-30'); Query OK, 1 row affected (0.16 sec)使用 select 语句显示表中的所有记录 -mysql> select * from DemoTable1446;这将产生以下输出 -+------------+ | DueDate ... 阅读更多