“wie man MySQL -Tabelle dupliziert” Code-Antworten

MySQL Copy -Tabelle mit neuem Namen


        
            
        
     CREATE TABLE IF NOT EXISTS new_table LIKE existing_table;

INSERT new_table
SELECT * FROM existing_table;
Easy Eagle

Wählen Sie, wo mySQL dupliziert

SELECT 
    col1, COUNT(col1),
    col2, COUNT(col2)
FROM
    table_name
GROUP BY 
    col1, 
    col2
HAVING 
       (COUNT(col1) > 1) AND 
       (COUNT(col2) > 1);
Xanthous Xenomorph

MySQL Finden Sie Duplikate in derselben Tabelle

## Find ALL duplicate recods by value (without grouping them by value) ##
# to find the duplicate, 
# replace all instances of tableName with your table name
# and all instances of duplicateField with the field name where you look for duplicates
SELECT t1.*
FROM tableName AS t1
INNER JOIN(
	SELECT duplicateField
	FROM tableName
	GROUP BY duplicateField
	HAVING COUNT(duplicateField) > 1
)temp ON t1.duplicateField = temp.duplicateField
order by duplicateField
Yoshkinawa

wie man MySQL -Tabelle dupliziert

-- You can duplicate or "clone" a table's contents by executing
> CREATE TABLE new_table AS SELECT * FROM original_table;

-- keep in mind that new new_table inherits ONLY the basic column definitions, null settings
-- and default values of the original_table. It does not inherit indexes and auto_increment
-- definitions.
-------------------------------------------------------------------------------------------

-- To inherit all table definitions
> CREATE TABLE new_table LIKE original_table; -- copy table structure only
> INSERT INTO new_table SELECT * FROM original_table; -- add data from old table
Darkstar

Ähnliche Antworten wie “wie man MySQL -Tabelle dupliziert”

Fragen ähnlich wie “wie man MySQL -Tabelle dupliziert”

Weitere verwandte Antworten zu “wie man MySQL -Tabelle dupliziert” auf Sql

Durchsuchen Sie beliebte Code-Antworten nach Sprache

Durchsuchen Sie andere Codesprachen