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11 wrz 2012 · The following query gives the list of all the primary keys in the given database. SELECT DISTINCT TABLE_NAME ,column_name FROM INFORMATION_SCHEMA.key_column_usage WHERE TABLE_SCHEMA IN ('*your_db_name*');
26 lut 2010 · If you want to generate the list of primary keys dynamically via PHP in one go without having to run through each table you can use. SELECT TABLE_NAME, COLUMN_NAME. FROM INFORMATION_SCHEMA.key_column_usage. WHERE table_schema = '$database_name' AND CONSTRAINT_NAME = 'PRIMARY'.
19 mar 2018 · SELECT k.COLUMN_NAME FROM information_schema.table_constraints t LEFT JOIN information_schema.key_column_usage k USING(constraint_name,table_schema,table_name) WHERE t.constraint_type='PRIMARY KEY' AND t.table_schema=DATABASE() AND t.table_name='owalog';
21 mar 2024 · Below are five ways to get the primary key column/s from an existing table in MySQL. The SHOW KEYS Statement. In MySQL we can use the SHOW KEYS statement to get the primary key for a given table: SHOW KEYS FROM Person WHERE Key_name = 'PRIMARY'; Example result:
MySQL PRIMARY KEY Constraint. The PRIMARY KEY constraint uniquely identifies each record in a table. Primary keys must contain UNIQUE values, and cannot contain NULL values. A table can have only ONE primary key; and in the table, this primary key can consist of single or multiple columns (fields).
To get the primary key of a table in PHP, you can use the SHOW KEYS SQL statement to retrieve information about the keys (including the primary key) of a table. You can use the mysql_query() or mysqli_query() function to execute the SHOW KEYS statement and retrieve the result set.
30 lip 2019 · To get the primary key of a table, you can use the show command. The syntax is as follows − SHOW INDEX FROM yourDatebaseName.yourTableName WHERE Key_name = 'PRIMARY';
