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15 Μαρ 2010 · UPDATE (SELECT T.FIELD A, S.FIELD B FROM TABLE_T T INNER JOIN TABLE_S S ON T.ID = S.ID) SET B = A; A and B are alias fields, you do not need to point the table.
This tutorial shows you how to perform cross-table updates by using the MySQL UPDATE JOIN statement with the INNER JOIN or LEFT JOIN clause.
2 Ιουν 2023 · To update data in a table, we can run an UPDATE statement. The syntax of an update statement is this: UPDATE table. SET column = value. WHERE condition; You can specify one table and one or more pairs of columns and values. You can also specify a condition in the WHERE clause so that only matching rows are updated.
9 Ιουν 2023 · In some database vendors (SQL Server, MySQL, PostgreSQL), you are able to use a JOIN in an UPDATE statement to update data using values in another table. The parameters are: table1: The name of the table you want to update. column: The column whose value you want to update.
30 Μαΐ 2011 · create table table_b ( id int, field_2 int ); insert into table_a values ( 1, 1, 0 ), ( 2, 2, 0 ); insert into table_b values ( 1, 42 ), ( 2, 99 ); update table_a a. set a.field_2 = b.field_2. from table_b b. where a.id = b.id; select * from table_a; ID FIELD_1 FIELD_2.
26 Ιαν 2024 · In this guide, we will delve into how to perform an UPDATE using a SELECT query across multiple tables within MySQL 8. This powerful technique allows you to change records in one table based on values in other tables, combining data retrieval with data modification in one step.
update invoiceLine inner join terminal on terminal.ctn = invoiceLine.ctn set invoiceLine.network = ( select network.label from invoiceLine inner join terminal on terminal.ctn = invoiceLine.ctn inner join network on network.id = terminal.network ) where invoiceLine.ctn = terminal.ctn
