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Tag: where-clause

SQL CASE that matches value or uses LIKE ‘%’

I’m trying to do a wildcard retrieve if a defined variable is blank. But I can’t figure out the correct syntax. Answer It is as simple as this: The expression NULLIF(x, ”) will convert ” to null. Then we take advantage of how null comparison works: If @customerID is not null then first…

Why doesn’t the WHERE work in this sql query

I’m writing a SQL query that needs to only show the results where the ‘titel’ is the same as ‘Baklava’, but it doesn’t return any rows. When I try to use the query without the WHERE, is shows all the results, but I need the WHERE clause to work. Here is the query I’m …

SQL Insert into with join and where

I have three tables. For example: newTable: oldTable: associativeTable: What I want to do now is: I want to move the name column from oldTable to newTable. I have already altered newTable and added an empty name column. Now I’m trying to write a correct INSERT INTO statement. What I have so far is: I&#8…

MySQL table update after multi field check

Hi I have two table one like this one: table1 and one like this: table2 I would like to update all the fields on the table2 column “newID” based on this rules: if (table2.ID = table1.ID_actual or table2.ID=table1.ID_old) then table2.newID = table1.newID How can I resolve this problem ? Answer You …