How to implement query counting function in thinkphp5
1. Query
In ThinkPHP5, we can query the database through the Db
class or the Model
class Make an inquiry. Here we take the Model
class as an example.
Basic query
We can implement basic query operations through the select()
method, as follows:
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|
In the above code, the where()
method is used to specify the query conditions, and its parameter format is where (query field, query value)
. When the query conditions are multiple fields, we can use chain operations.
is as follows:
1 |
|
This means querying the records in the user table whose name is Zhang San and whose age is 20.
Conditional query
We can add where()
, whereOr()# to the query statement ##,
whereLike() and other conditional query methods to achieve more flexible query operations.
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|
where() method and the
whereOr() method respectively indicate that the query conditions are "and" and The "or" relationship has the same parameter format; the
whereLike() method is used to implement fuzzy query, and its second parameter represents the query matching condition.
order() to sort the query results, as follows:
1 |
|
- Paging query
limit() method to implement paging query.
limit()The method has two parameters. The first parameter indicates the starting offset, and the second parameter indicates the number of records displayed on each page.
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2. Counting
In ThinkPHP5, we can implement the basic counting function through thecount() method.
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count() method actually performs a query on the database, so in actual applications, errors should be minimized as much as possible. Necessary counting operations to improve application performance.
The above is the detailed content of How to implement query counting function in thinkphp5. For more information, please follow other related articles on the PHP Chinese website!

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