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4 maj 2017 · How to replace multiple values in 1 column in mysql SELECT query using REPLACE()?
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 is an 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.
The REPLACE statement returns a count to indicate the number of rows affected. This is the sum of the rows deleted and inserted. If the count is 1 for a single-row REPLACE, a row was inserted and no rows were deleted. If the count is greater than 1, one or more old rows were deleted before the new row was inserted.
1 kwi 2024 · The MySQL REPLACE statement allows us to replace data in a table with new data. The new data can be explicitly provided in the statement or it could come from the result of a query. Therefore, we can use the REPLACE statement to effectively “refresh” a table with new/updated data from another table.
MySQL REPLACE Statement. In general, if we want to add records into an existing table, we use the MySQL INSERT statement. Likewise, we can also add new records or replace an existing records using the MySQL REPLACE statement. The replace statement is similar to the insert statement.
The REPLACE () function replaces all occurrences of a substring within a string, with a new substring. Note: This function performs a case-sensitive replacement. Syntax. REPLACE (string, from_string, new_string) Parameter Values. Technical Details. Works in: From MySQL 4.0. More Examples. Example. Replace "X" with "M":
