mysql - SELECT *, FUNCTION1(), FUNCTION(2) FROM -
Is there any way i can ask all the columns in MySQL that I can simulate this query
SELECT *, FUNCTION1 (), FUCTION2 () from Table 1;
While not every column in the selected segment is being calculated?
The query that I am trying to achieve is to add all the columns required for all the columns so I will add some more columns to include in the resultset. Probably
SELECT *, "sum", CONCAT (col1, "", col3) as table2 + col5 + col7;
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Yes, how can you do that which you show
One selection can contain these words:
- One column
- one expression
- a wildcard (
- A qualified wildcard (like
table1. *
) - A qualified wildcard (like
You can use any of these or all of the same selection queries.
Speaking strictly, SQL-99 does not give the standard *
in the selection list with other words, but you The case may be used with appropriate wildcards. But MySQL is more acceptable, it is not as strict as the standard of this matter.
The standard rule shows.
The document is available for MySQL Behavior says, "Use a disqualifying *
with other items in the selection list can generate a parse error. To avoid this problem, an appropriate tbl_name. * < / Code> Use context. "But in my experience it's OK.
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