I've searched around but can't find an answer for this one. I'm trying to duplicate this T-SQL code from MSSQL:if exists(SELECT 1 FROM table WHERE id=@id)begin// do something here.endAny help would be greatly appreciated!On another note, I read that there are plans, or at least a feature request, to support something along the lines of T-SQL's @@ERROR, where in you can check if an error occurred exactly after a statement. Example:INSERT INTO table (col1, col2, col3) VALUES (val1, val2, val3)if (@@ERROR 0)begin// An error occurred and we'll handle it hereendBasically I need the means to respond to a an error for a specific query, and not just an error code.Additionally, is it possible to setup a general catch-all error block? Will the SQLEXCEPTION catch all errors?Thanks in advance!

Depends on the data. In generally you don't save multiple values in a single field. If you have a list of values you need to save, you put them in a separate table, one item per row.For example, if you had a list of items and a list of 'tags' for each item, you would set that up somewhat like this: +-+ +-+ items itemtags +-+ +-+ id (PK) - itemid (PK, FK) name tag (PK) +-+ +-+The itemtags table would store the tags for each item, and link each tag to it's item via the itemid Foreign Key field. Here is an example of what the data would look like: SELECT.

Oct 22, 2018  In the first approach, we will get the entire column name with meaningful information. The syntax is as follows − DESC yourTableName; Let us apply the above query to check whether the column name exists or not. However, this approach is not good since it display all the columns. Mysql DESC ColumnExistDemo; The following is the output.

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FROM items;+-+-+ id name +-+-+ 1 Item 1 2 Item 2 +-+-+ SELECT. FROM itemtags;+-+-+ itemid tag +-+-+ 1 tag1 1 tag2 2 tag1 2 tag3 +-+-+There are many ways in which you can fetch the tags for each item, depending on how you are using it in your code, but if you wanted to return each item with a comma separated list of tags, MySQL's function can be used. Like: SELECT i.id, i.name, GROUPCONCAT(t.tag) AS tagsFROM items AS iJOIN itemtags as tON i.id = t.itemidGROUP BY i.id;+-+-+-+ id name tags +-+-+-+ 1 Item 1 tag1,tag2 2 Item 2 tag1,tag3 +-+-+-+The tags field in that result set could then be exploded in PHP to get them as arrays. Of course, this is not the most efficient way to fetch tags for a single item, but it can be useful if you don't overuse it. (String manipulation is relatively expensive.).