PHP database queries are commands that are used to retrieve, insert, update, or delete data in a database using the PHP programming language. Some common types of database queries in PHP include:
1. SELECT: This query is used to retrieve data from the database. It is used with the SELECT keyword followed by the columns you want to retrieve and the FROM keyword to specify the table you want to retrieve the data from. You can also use conditions, sorting, and joining statements to filter and manipulate the data.
Example:
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SELECT column1, column2 FROM table WHERE condition;
“`
2. INSERT INTO: This query is used to insert new data into the database. It is used with the INSERT INTO keyword followed by the table name and the columns and values you want to insert.
Example:
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INSERT INTO table (column1, column2) VALUES (value1, value2);
“`
3. UPDATE: This query is used to update existing data in the database. It is used with the UPDATE keyword followed by the table name and the SET keyword to specify the columns and values you want to update. You can also use conditions to update specific rows.
Example:
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UPDATE table SET column1 = value1, column2 = value2 WHERE condition;
“`
4. DELETE: This query is used to delete data from the database. It is used with the DELETE FROM keyword followed by the table name and optional conditions to specify the rows you want to delete.
Example:
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DELETE FROM table WHERE condition;
“`
These are just some of the basic types of database queries in PHP. There are many more advanced query types and functions available in PHP for working with databases.