WHERE 语句
SQL中使用where可能会有一些不安全的动态参数传入或者一些复杂的SQL语句,但是Medoo提供非常简介和安全的方法来实现这些．
基础使用
在基础使用中. 你可以使用一些符号对参数进行过滤
$database->select("account", "user_name", [
"email" => "[email protected]"
]);
// WHERE email = '[email protected]'
$database->select("account", "user_name", [
"user_id" => 200
]);
// WHERE user_id = 200
$database->select("account", "user_name", [
"user_id[>]" => 200
]);
// WHERE user_id > 200
$database->select("account", "user_name", [
"user_id[>=]" => 200
]);
// WHERE user_id >= 200
$database->select("account", "user_name", [
"user_id[!]" => 200
]);
// WHERE user_id != 200
$database->select("account", "user_name", [
"age[<>]" => [200, 500]
]);
// WHERE age BETWEEN 200 AND 500
$database->select("account", "user_name", [
"age[><]" => [200, 500]
]);
// WHERE age NOT BETWEEN 200 AND 500
// [><] 和 [<>] 可以用于 datetime
$database->select("account", "user_name", [
"birthday[><]" => [date("Y-m-d", mktime(0, 0, 0, 1, 1, 2015)), date("Y-m-d")]
]);
//WHERE `birthday` BETWEEN '2015-01-01' AND '2017-01-16' (now)
// 你不仅可以使用字符串和数字，还可以使用数组
$database->select("account", "user_name", [
"OR" => [
"user_id" => [2, 123, 234, 54],
"email" => ["[email protected]", "[email protected]", "[email protected]"]
]
]);
// WHERE
// user_id IN (2,123,234,54) OR
// email IN ('[email protected]','[email protected]','[email protected]')
// 多条件查询
$database->select("account", "user_name", [
"AND" => [
"user_name[!]" => "foo",
"user_id[!]" => 1024,
"email[!]" => ["[email protected]", "[email protected]", "[email protected]"],
"city[!]" => null,
"promoted[!]" => true
]
]);
// WHERE
// `user_name` != 'foo' AND
// `user_id` != 1024 AND
// `email` NOT IN ('[email protected]','[email protected]','[email protected]') AND
// `city` IS NOT NULL
// `promoted` != 1
// 或者嵌套 select() ak get() 方法
$database->select("account", "user_name", [
"user_id" => $database->select("post", "user_id", ["comments[>]" => 40])
]);
// WHERE user_id IN (2, 51, 321, 3431)
条件搜索
你可以使用"AND" 或 "OR" 来拼接非常复杂的SQL语句
// 基础使用
$database->select("account", "user_name", [
"AND" => [
"user_id[>]" => 200,
"age[<>]" => [18, 25],
"gender" => "female"
]
]);
// WHERE user_id > 200 AND age BETWEEN 18 AND 25 AND gender = 'female'
$database->select("account", "user_name", [
"OR" => [
"user_id[>]" => 200,
"age[<>]" => [18, 25],
"gender" => "female"
]
]);
// WHERE user_id > 200 OR age BETWEEN 18 AND 25 OR gender = 'female'
// 复合条件
$database->has("account", [
"AND" => [
"OR" => [
"user_name" => "foo",
"email" => "[email protected]"
],
"password" => "12345"
]
]);
// WHERE (user_name = 'foo' OR email = '[email protected]') AND password = '12345'
// 注意
// 因为medoo使用的是数组传参，所以下面这种用法是错误的。
$database->select("account", '*', [
"AND" => [
"OR" => [
"user_name" => "foo",
"email" => "[email protected]"
],
"OR" => [
"user_name" => "bar",
"email" => "[email protected]"
]
]
]);
// [X] SELECT * FROM "account" WHERE ("user_name" = 'bar' OR "email" = '[email protected]')
// 正确的方式是使用如下方式定义复合条件
$database->select("account", '*', [
"AND" => [ //实际应用时这儿可以使用AND或者OR
"OR" => [ //第一个条件
"user_name" => "foo",
"email" => "[email protected]"
],
"OR" => [ //第二个条件
"user_name" => "bar",
"email" => "[email protected]"
]
]
]);
// SELECT * FROM "account"
// WHERE (
// (
// "user_name" = 'foo' OR "email" = '[email protected]'
// )
// AND
// (
// "user_name" = 'bar' OR "email" = '[email protected]'
// )
// )
模糊匹配 like
LIKE 使用语法 [~] .
// 默认情况下，使用%在前后包含关键词
$database->select("person", "id", [
"city[~]" => "lon"
]);
WHERE "city" LIKE '%lon%'
// 数组形式，查询多个关键词
$database->select("person", "id", [
"city[~]" => ["lon", "foo", "bar"]
]);
WHERE "city" LIKE '%lon%' OR "city" LIKE '%foo%' OR "city" LIKE '%bar%'
// 不包含 [!~]
$database->select("person", "id", [
"city[!~]" => "lon"
]);
WHERE "city" NOT LIKE '%lon%'
// 使用SQL自带的一些通配符
// 你可以使用sql自带的一些通配符来完成较复杂的查询
$database->select("person", "id", [
"city[~]" => "stan%" // Kazakhstan, Uzbekistan, Türkmenistan
]);
$database->select("person", "id", [
"city[~]" => "Londo_" // London, Londox, Londos...
]);
$database->select("person", "id", [
"name[~]" => "[BCR]at" // Bat, Cat, Rat
]);
$database->select("person", "id", [
"name[~]" => "[!BCR]at" // Eat, Fat, Hat...
]);
排序使用
$database->select("account", "user_id", [
// Single condition
"ORDER" => "user_id",
// Multiple condition
"ORDER" => [
// Order by column with sorting by customized order.
"user_id" => [43, 12, 57, 98, 144, 1],
// Order by column
"register_date",
// Order by column with descending sorting
"profile_id" => "DESC",
// Order by column with ascending sorting
"date" => "ASC"
]
]);
全文检索
// [MATCH]
$database->select("post_table", "post_id", [
"MATCH" => [
"columns" => ["content", "title"],
"keyword" => "foo"
]
]);
// WHERE MATCH (content, title) AGAINST ('foo')
使用SQL函数
在一些特殊的情况下，你可能需要使用SQL系统函数，只需要字段名前加上#号即可
$data = $database->select('account', [
'user_id',
'user_name'
], [
'#datetime' => 'NOW()'
]);
// SELECT "user_id","user_name"
// FROM "account"
// WHERE "datetime" = NOW()
// [IMPORTANT] Keep in mind that, the value will not be quoted should be matched as XXX() uppercase.
// The following sample will be failed.
$database->select('account', [
'user_id',
'user_name'
], [
'#datetime2' => 'now()',
'datetime3' => 'NOW()',
'#datetime4' => 'NOW'
]);
其它参数
$database->select("account", "user_id", [
"GROUP" => "type",
// Must have to use it with GROUP together
"HAVING" => [
"user_id[>]" => 500
],
// LIMIT => 20
"LIMIT" => [20, 100]
]);
// SELECT user_id FROM account
// GROUP BY type
// HAVING user_id > 500
// LIMIT 20,100