Question

I have written a query in access and now I am trying to write the same in SQL Server I am getting following error:

Msg 164, Level 15, State 1, Procedure OQRY_STEP_1_1, Line 15
Each GROUP BY expression must contain at least one column that is not an outer reference.

My SQL Query is as follows:

SELECT
    ns11.SYS_ID,
    ns11.SUB_NET_ID,
    ns11.TEMP_ID,
    ns11.EQ_ID,
    ns11.NODE_NAME,
    ns11.EQ_NAME,
    ns11.VAR_NAME,
    ns11.VAR_SET,
    ns11.VAR_SUBSET,
    ns11.EQ_TYPE,
    ns11.RHS_RELN,
    ns11.RHS_OBJECT,
    ns11.EQ_TP_OFFSET,
    ns11.RHS_TP_OFFSET,
    ns11.RETAIN,
    nmte.RHS_VAR_SET,
    nmte.RHS_VAR_SUBSET,
    nmte.RHS_VAR_NAME,
    0 AS RHS_VAR_TYPE,
    CASE
        WHEN [asp].[VALUE] = NULL THEN 0
        ELSE [asp].[VALUE]
    END RHS_VALUE
INTO ##OT_STEP_1_1
FROM (##NT_STEP_1_1 ns11
    INNER JOIN ##NT_MASTER_TEMP_EQUATION nmte
        ON (ns11.SYS_ID = nmte.SYS_ID)
            (ns11.SUB_NET_ID = nmte.SUB_NET_ID)
        AND (ns11.TEMP_ID = nmte.TEMP_ID)
        AND (ns11.EQ_ID = nmte.EQ_ID)
        AND (ns11.NODE_NAME = nmte.NODE_NAME)
        AND (nmte.SYS_ID = ns11.SYS_ID)
        AND (nmte.SUB_NET_ID = ns11.SUB_NET_ID))
    LEFT JOIN AMST_SIM_PAR asp ON 
        (nmte.SYS_ID = asp.SYS_ID)
        AND (nmte.SUB_NET_ID = ns11.SUB_NET_ID)
        AND (nmte.RHS_VAR_NAME = asp.VAR_NAME)
GROUP BY
    ns11.SYS_ID,
    ns11.SUB_NET_ID,
    ns11.TEMP_ID,
    ns11.EQ_ID,
    ns11.NODE_NAME,
    ns11.EQ_NAME,
    ns11.VAR_NAME,
    ns11.VAR_SET,
    ns11.VAR_SUBSET,
    ns11.EQ_TYPE,
    ns11.RHS_RELN,
    ns11.RHS_OBJECT,
    ns11.EQ_TP_OFFSET,
    ns11.RHS_TP_OFFSET,
    ns11.RETAIN,
    nmte.RHS_VAR_SET,
    nmte.RHS_VAR_SUBSET,
    nmte.RHS_VAR_NAME,
    0,
    CASE
        WHEN [asp].[VALUE] = NULL THEN 0
        ELSE [asp].[VALUE]
    END
ORDER BY
    CASE
        WHEN [asp].[VALUE] = NULL THEN 0
        ELSE [asp].[VALUE]
    END;

I am not sure why it is not taking 0 in the group by clause?

Answer 1

I think the GROUP BY ..., 0, ... is the issue here. Try removing that 0 from there. There is no point grouping by a constant.

---

Sidenote:

CASE WHEN [AMST_SIM_PAR].[VALUE] = NULL
THEN 0
ELSE [AMST_SIM_PAR].[VALUE]
END

should be be written with IS NULL instead of = NULL or as:

COALESCE( [AMST_SIM_PAR].[VALUE], 0 )