MySQL – UPDATE query with LIMIT
If you want to update multiple rows using limit in MySQL you can use this construct: UPDATE table_name SET name=”test” WHERE id IN ( SELECT id FROM ( SELECT id FROM table_name ORDER BY id ASC LIMIT 0, 10 ) tmp )
sql-update
MySql – Way to update portion of a string?
I think this should work: UPDATE table SET field = REPLACE(field, ‘string’, ‘anothervalue’) WHERE field LIKE ‘%string%’;
T-SQL: Using a CASE in an UPDATE statement to update certain columns depending on a condition
You can’t use a condition to change the structure of your query, just the data involved. You could do this: update table set columnx = (case when condition then 25 else columnx end), columny = (case when condition then columny else 25 end) This is semantically the same, but just bear in mind that both … Read more
Update Multiple Rows in Entity Framework from a list of ids
something like below var idList=new int[]{1, 2, 3, 4}; using (var db=new SomeDatabaseContext()) { var friends= db.Friends.Where(f=>idList.Contains(f.ID)).ToList(); friends.ForEach(a=>a.msgSentBy=’1234′); db.SaveChanges(); } UPDATE: you can update multiple fields as below friends.ForEach(a => { a.property1 = value1; a.property2 = value2; });
Update or Insert (multiple rows and columns) from subquery in PostgreSQL
For the UPDATE Use: UPDATE table1 SET col1 = othertable.col2, col2 = othertable.col3 FROM othertable WHERE othertable.col1 = 123; For the INSERT Use: INSERT INTO table1 (col1, col2) SELECT col1, col2 FROM othertable You don’t need the VALUES syntax if you are using a SELECT to populate the INSERT values.
how to increment integer Columns value by 1 in SQL
To add one to every value in the table… UPDATE myTable SET ID = ID + 1 To create a new value, one more then the previous highest (usually), use a column with IDENTITY
How to prepend a string to a column value in MySQL?
You can use the CONCAT function to do that: UPDATE tbl SET col=CONCAT(‘test’,col); If you want to get cleverer and only update columns which don’t already have test prepended, try UPDATE tbl SET col=CONCAT(‘test’,col) WHERE col NOT LIKE ‘test%’;
SQL Update with row_number()
One more option UPDATE x SET x.CODE_DEST = x.New_CODE_DEST FROM ( SELECT CODE_DEST, ROW_NUMBER() OVER (ORDER BY [RS_NOM]) AS New_CODE_DEST FROM DESTINATAIRE_TEMP ) x
MySQL, update multiple tables with one query
Take the case of two tables, Books and Orders. In case, we increase the number of books in a particular order with Order.ID = 1002 in Orders table then we also need to reduce that the total number of books available in our stock by the same number in Books table. UPDATE Books, Orders SET … Read more
Change One Cell’s Data in mysql
You probably need to specify which rows you want to update… UPDATE mytable SET column1 = value1, column2 = value2 WHERE key_value = some_value;