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13 kwi 2022 · I want to be able to update a table of the same schema using a "replace into" statement. In the end, I need to be able to update a large table with values that may have changed. Here is the query I am using to start off: REPLACE INTO table_name.
REPLACE works exactly like INSERT, except that if an old row in the table has the same value as a new row for a PRIMARY KEY or a UNIQUE index, the old row is deleted before the new row is inserted. See Section 15.2.7, “INSERT Statement”. REPLACE is a MySQL extension to the SQL standard.
The MySQL REPLACE statement works as follows: Step 1. Insert a new row into the table, if a duplicate key error occurs. Step 2. If the insertion fails due to a duplicate-key error occurs: Delete the conflicting row that causes the duplicate key error from the table. Insert the new row into the table again.
The REPLACE () function replaces all occurrences of a substring within a string, with a new substring. Note: This function performs a case-sensitive replacement.
REPLACE is a MySQL extension to the SQL standard. It either inserts, or deletes and inserts. For another MySQL extension to standard SQL—that either inserts or updates —see Section 15.2.7.2, “INSERT ...
7 mar 2024 · In this tutorial, we learned about the usage of the MySQL REPLACE() function and MySQL REPLACE INTO Statement. Both the variants are very useful to perform bulk updates or for targeted string replacements within a given column or field.
To replace a record in a table from MySQL Database through a Node.js program we need to execute the Alter statement using the query() function of the mysql2 library as −. sql="REPLACE INTO table_name (column1, column2, column3,...columnN) VALUES (value1, value2, value3,...valueN)" con.query(sql);
