我正在尝试使用MAX(case when col4='ABC' then col1 else 0 end) OVER (PARTITION BY col2 order by **col3**)
col1~col2~col3~col4
30 A B1 ABC
35 A A1 ABC
36 A NULL NULL
40 A X1 ABC
50 B M1 ABD
但是我得到的结果是40，但是我希望得到35。看起来像
按col3排序 MAX汇总之前未应用。还有其他办法吗？
我无法在where子句中编写row_number()，因为我们正在尝试创建列，并且周围有许多列和复杂的逻辑。
目前，我正在Teradata中进行尝试，但实际上它将在HIVE中实现。
答案 0 :(得分：0)
这个评论太长了。对于此表达式：
MAX(case when col4 = 'ABC' then col1 else 0 end) OVER (PARTITION BY col2 order by col3)
您应该得到：
col1~col2~col3~col4
30 A A1 ABC 30
40 A X1 ABC 40
50 B M1 ABD 0
如果您要全部“ 30”，则可以考虑：
min(case when col4 = 'ABC' then col1 end) over ()
答案 1 :(得分：0)
PARTITION BY将聚集在不同的col2值上。因此，三个col2'A'值的MAX()值为40。
如果要返回“ 35”。这表明A1是分区中返回的第一行。 First_Value（）可用于返回分区组中的第一行。
FIRST_VALUE(CASE WHEN col4 = 'ABC' THEN col1
ELSE 0 END) OVER (PARTITION BY col2 order by col3)
答案 2 :(得分：0)
编辑：已移至子查询中的窗口功能以获取正确的行
样本数据（作为表变量）
##########################################################################
# mmslite802.sh #
# Build file for making MMS-Lite for LINUX, QNX, etc.
# Use the first command line arg ($1) to specify the platform.
# Use the second command line arg ($2) to pass param to make (like clean).
# if $1=AIX Build for the AIX platform
# if $1=LYNX Build for the LYNX platform
# if $1=LINUX Build for the LINUX platform (default if $1 is empty)
# if $1=QNX Build for the QNX platform
# #
# Examples:
# ./mmslite802.sh LINUX
# ./mmslite802.sh LINUX clean
# #
# NOTE: ositpxs.mak only works on LINUX.
# However, it should be usable on other platforms if
# "clnp_linux.c" is replaced with a file ported to each platform.
# #
##########################################################################
# MODIFICATION LOG : #
# Date Who Rev Comments #
# -------- --- ------ -----------------------------------------------#
# 09/19/14 JRB Add scl_test
# 02/03/11 JRB Del uositcps0, uositpxs0.
# 06/25/10 JRB Del obsolete ositp4e library.
# 12/15/09 JRB 18 Del ssec0 library.
# Make object directories only if not present.
# 03/17/08 JRB 17 Del old ositcpe, ositpxe libraries
# and sreadd, slistend executables.
# 01/18/08 RKR 16 Removed the line that ran mbufcalc
# 05/23/07 LWP 15 Ported to bash Posix
# 03/08/07 JRB 14 Add sositpxs0, uositpxs0.
# 12/01/06 JRB 13 Add ositpxs, smpval, cositpxs0, scl_tpxs0.
# 11/17/06 JRB 12 Add gse_mgmt, gse_mgmt_test
# 11/13/06 JRB 11 Del client, server, uca_srvr sample executables
# (they all link to ositcpe lib).
# Del "*ositp4e", "*ositpxe" sample executables.
# 08/16/05 RKR 10 Renamed
# 08/15/05 JRB 09 Changed name to make802.sh
# 08/08/05 EJV 08 Added arg $2, and test for correct args
# Rem setting AIX compiler mode (see platform.mak)
# Export PLATFORM variable once for all makefiles.
# 08/03/05 JRB 07 Add *ositp4e.mak, *ositpxe.mak, iecgoose.mak.
# 08/16/04 JRB 06 Use "X_$1" in "if test" to work w/ NO arg on cmdline
# 08/04/04 EJV 05 Added AIX support.
# 07/19/04 JRB 04 Add scl_srvr.mak.
# 03/15/04 GLB 03 Copy sockets executables to "/usr/bin".
# 11/18/03 JRB 02 Add ositcps_*.a, *ositcps0_ld, ssec0_*.a
# Pass PLATFORM=$1 to each make command
# to allow use on QNX, etc.
# 12/09/02 CRM 01 Created mkall.sh from QNX script file #
##########################################################################
##########################################################################
# MAKE ALL LIBRARIES #
##########################################################################
# ------------------------------------------------------------------------
# NOTE: The platform.mak included in every makefile specifies pthreads
# support if available. There is small performance penalty when
# multithreading support is enabled.
# The platform.mak shows how to disable multithreading support.
# ------------------------------------------------------------------------
# check if correct parameters were passed
#
if [ -z "$1" ]
then
echo "No command-line arguments. Must specify platform (LINUX, QNX, etc.)"
exit 0
fi
if [ "$1" = "clean" ]
then
echo "Must specify platform in first argument (LINUX, QNX, etc.)"
exit 0
fi
if [ "$1" = "LINUX" -o "$1" = "LYNX" -o "$1" = "QNX" -o "$1" = "AIX" ]
then
if [ -z "$2" ]
then
echo "==============================="
echo "= Making platform: $1"
echo "==============================="
else
if [ "$2" = "clean" ]
then
rm -f cc.lst
rm -f foundry.tmp
echo "==============================="
echo "= Cleaning platform: $1"
echo "==============================="
else
echo "ERROR: invalid second argument: $2"
exit 0
fi
fi
else
echo "ERROR: unsupported platform: $1"
exit 0
fi
#
export PLATFORM=$1
# make directories
if [ ! -d ../../lib ]
then
mkdir ../../lib
fi
if [ ! -d ../../bin ]
then
mkdir ../../bin
fi
# Make ALL object directories.
if [ ! -d obj_l ]; then
mkdir obj_l
fi
if [ ! -d obj_n ]; then
mkdir obj_n
fi
if [ ! -d obj_ld ]; then
mkdir obj_ld
fi
if [ ! -d obj_nd ]; then
mkdir obj_nd
fi
if [ ! -d obj_mvlu_l ]; then
mkdir obj_mvlu_l
fi
if [ ! -d obj_mvlu_n ]; then
mkdir obj_mvlu_n
fi
if [ ! -d obj_mvlu_ld ]; then
mkdir obj_mvlu_ld
fi
if [ ! -d obj_mvlu_nd ]; then
mkdir obj_mvlu_nd
fi
if [ ! -d obj_ositcps_l ]; then
mkdir obj_ositcps_l
fi
if [ ! -d obj_ositcps_n ]; then
mkdir obj_ositcps_n
fi
if [ ! -d obj_ositcps_ld ]; then
mkdir obj_ositcps_ld
fi
if [ ! -d obj_ositcps_nd ]; then
mkdir obj_ositcps_nd
fi
if [ ! -d obj_ositpxs_l ]; then
mkdir obj_ositpxs_l
fi
if [ ! -d obj_ositpxs_n ]; then
mkdir obj_ositpxs_n
fi
if [ ! -d obj_ositpxs_ld ]; then
mkdir obj_ositpxs_ld
fi
if [ ! -d obj_ositpxs_nd ]; then
mkdir obj_ositpxs_nd
fi
if [ ! -d obj_foundry_ld ]; then
mkdir obj_foundry_ld
fi
if [ ! -d obj_mmslog_ld ]; then
mkdir obj_mmslog_ld
fi
if [ ! -d obj_cositcps0_ld ]; then
mkdir obj_cositcps0_ld
fi
if [ ! -d obj_sositcps0_ld ]; then
mkdir obj_sositcps0_ld
fi
if [ ! -d obj_scl_srvr_ld ]; then
mkdir obj_scl_srvr_ld
fi
if [ ! -d obj_scl_test_ld ]; then
mkdir obj_scl_test_ld
fi
rm cc.lst
echo STARTING MAKE OF meml_l.a LIBRARY for $1 >> cc.lst 2>&1
make -f meml.mak $2 DFLAG=_l DEFS=-DDEBUG_SISCO # logging / no debug
echo STARTING MAKE OF meml_n.a LIBRARY for $1 >> cc.lst 2>&1
make -f meml.mak $2 DFLAG=_n # no logging / no debug
echo STARTING MAKE OF meml_ld.a LIBRARY for $1 >> cc.lst 2>&1
make -f meml.mak $2 OPT=-g DFLAG=_ld DEFS=-DDEBUG_SISCO # logging / debug
echo STARTING MAKE OF meml_nd.a LIBRARY for $1 >> cc.lst 2>&1
make -f meml.mak $2 OPT=-g DFLAG=_nd # no logging / debug
echo STARTING MAKE OF mem_l.a LIBRARY for $1 >> cc.lst 2>&1
make -f mem.mak $2 DFLAG=_l DEFS=-DDEBUG_SISCO # logging / no debug
echo STARTING MAKE OF mem_n.a LIBRARY for $1 >> cc.lst 2>&1
make -f mem.mak $2 DFLAG=_n # no logging / no debug
echo STARTING MAKE OF mem_ld.a LIBRARY for $1 >> cc.lst 2>&1
make -f mem.mak $2 OPT=-g DFLAG=_ld DEFS=-DDEBUG_SISCO # logging / debug
echo STARTING MAKE OF mem_nd.a LIBRARY for $1 >> cc.lst 2>&1
make -f mem.mak $2 OPT=-g DFLAG=_nd # no logging / debug
echo STARTING MAKE OF smem_l.a LIBRARY for $1 >> cc.lst 2>&1
make -f smem.mak $2 DFLAG=_l DEFS=-DDEBUG_SISCO # logging / no debug
echo STARTING MAKE OF smem_n.a LIBRARY for $1 >> cc.lst 2>&1
make -f smem.mak $2 DFLAG=_n # no logging / no debug
echo STARTING MAKE OF smem_ld.a LIBRARY for $1 >> cc.lst 2>&1
make -f smem.mak $2 OPT=-g DFLAG=_ld DEFS=-DDEBUG_SISCO # logging / debug
echo STARTING MAKE OF smem_nd.a LIBRARY for $1 >> cc.lst 2>&1
make -f smem.mak $2 OPT=-g DFLAG=_nd # no logging / debug
echo STARTING MAKE OF slog_l.a LIBRARY for $1 >> cc.lst 2>&1
make -f slog.mak $2 DFLAG=_l DEFS=-DDEBUG_SISCO # logging / no debug
echo STARTING MAKE OF slog_n.a LIBRARY for $1 >> cc.lst 2>&1
make -f slog.mak $2 DFLAG=_n # no logging / no debug
echo STARTING MAKE OF slog_ld.a LIBRARY for $1 >> cc.lst 2>&1
make -f slog.mak $2 OPT=-g DFLAG=_ld DEFS=-DDEBUG_SISCO # logging / debug
echo STARTING MAKE OF slog_nd.a LIBRARY for $1 >> cc.lst 2>&1
make -f slog.mak $2 OPT=-g DFLAG=_nd # no logging / debug
echo STARTING MAKE OF asn1l_l.a LIBRARY for $1 >> cc.lst 2>&1
make -f asn1l.mak $2 DFLAG=_l DEFS=-DDEBUG_SISCO # logging / no debug
echo STARTING MAKE OF asn1l_n.a LIBRARY for $1 >> cc.lst 2>&1
make -f asn1l.mak $2 DFLAG=_n # no logging / no debug
echo STARTING MAKE OF asn1l_ld.a LIBRARY for $1 >> cc.lst 2>&1
make -f asn1l.mak $2 OPT=-g DFLAG=_ld DEFS=-DDEBUG_SISCO # logging / debug
echo STARTING MAKE OF asn1l_nd.a LIBRARY for $1 >> cc.lst 2>&1
make -f asn1l.mak $2 OPT=-g DFLAG=_nd # no logging / debug
echo STARTING MAKE OF mmsl_l.a LIBRARY for $1 >> cc.lst 2>&1
make -f mmsl.mak $2 DFLAG=_l DEFS=-DDEBUG_SISCO # logging / no debug
echo STARTING MAKE OF mmsl_n.a LIBRARY for $1 >> cc.lst 2>&1
make -f mmsl.mak $2 DFLAG=_n # no logging / no debug
echo STARTING MAKE OF mmsl_ld.a LIBRARY for $1 >> cc.lst 2>&1
make -f mmsl.mak $2 OPT=-g DFLAG=_ld DEFS=-DDEBUG_SISCO # logging / debug
echo STARTING MAKE OF mmsl_nd.a LIBRARY for $1 >> cc.lst 2>&1
make -f mmsl.mak $2 OPT=-g DFLAG=_nd # no logging / debug
echo STARTING MAKE OF mmsle_l.a LIBRARY for $1 >> cc.lst 2>&1
make -f mmsle.mak $2 DFLAG=_l DEFS=-DDEBUG_SISCO # logging / no debug
echo STARTING MAKE OF mmsle_n.a LIBRARY for $1 >> cc.lst 2>&1
make -f mmsle.mak $2 DFLAG=_n # no logging / no debug
echo STARTING MAKE OF mmsle_ld.a LIBRARY for $1 >> cc.lst 2>&1
make -f mmsle.mak $2 OPT=-g DFLAG=_ld DEFS=-DDEBUG_SISCO # logging / debug
echo STARTING MAKE OF mmsle_nd.a LIBRARY for $1 >> cc.lst 2>&1
make -f mmsle.mak $2 OPT=-g DFLAG=_nd # no logging / debug
echo STARTING MAKE OF ositcps_l.a LIBRARY for $1 >> cc.lst 2>&1
make -f ositcps.mak $2 DFLAG=_l DEFS=-DDEBUG_SISCO # logging / no debug
echo STARTING MAKE OF ositcps_n.a LIBRARY for $1 >> cc.lst 2>&1
make -f ositcps.mak $2 DFLAG=_n # no logging / no debug
echo STARTING MAKE OF ositcps_ld.a LIBRARY for $1 >> cc.lst 2>&1
make -f ositcps.mak $2 OPT=-g DFLAG=_ld DEFS=-DDEBUG_SISCO # logging / debug
echo STARTING MAKE OF ositcps_nd.a LIBRARY for $1 >> cc.lst 2>&1
make -f ositcps.mak $2 OPT=-g DFLAG=_nd # no logging / debug
echo STARTING MAKE OF ositpxs_l.a LIBRARY for $1 >> cc.lst 2>&1
make -f ositpxs.mak $2 DFLAG=_l DEFS=-DDEBUG_SISCO # logging / no debug
echo STARTING MAKE OF ositpxs_n.a LIBRARY for $1 >> cc.lst 2>&1
make -f ositpxs.mak $2 DFLAG=_n # no logging / no debug
echo STARTING MAKE OF ositpxs_ld.a LIBRARY for $1 >> cc.lst 2>&1
make -f ositpxs.mak $2 OPT=-g DFLAG=_ld DEFS=-DDEBUG_SISCO # logging / debug
echo STARTING MAKE OF ositpxs_nd.a LIBRARY for $1 >> cc.lst 2>&1
make -f ositpxs.mak $2 OPT=-g DFLAG=_nd # no logging / debug
echo STARTING MAKE OF gse_mgmt_l.a LIBRARY for $1 >> cc.lst 2>&1
make -f gse_mgmt.mak $2 DFLAG=_l DEFS=-DDEBUG_SISCO # logging / no debug
echo STARTING MAKE OF gse_mgmt_n.a LIBRARY for $1 >> cc.lst 2>&1
make -f gse_mgmt.mak $2 DFLAG=_n # no logging / no debug
echo STARTING MAKE OF gse_mgmt_ld.a LIBRARY for $1 >> cc.lst 2>&1
make -f gse_mgmt.mak $2 OPT=-g DFLAG=_ld DEFS=-DDEBUG_SISCO # logging / debug
echo STARTING MAKE OF gse_mgmt_nd.a LIBRARY for $1 >> cc.lst 2>&1
make -f gse_mgmt.mak $2 OPT=-g DFLAG=_nd # no logging / debug
echo STARTING MAKE OF smpval_l.a LIBRARY for $1 >> cc.lst 2>&1
make -f smpval.mak $2 DFLAG=_l DEFS=-DDEBUG_SISCO # logging / no debug
echo STARTING MAKE OF smpval_n.a LIBRARY for $1 >> cc.lst 2>&1
make -f smpval.mak $2 DFLAG=_n # no logging / no debug
echo STARTING MAKE OF smpval_ld.a LIBRARY for $1 >> cc.lst 2>&1
make -f smpval.mak $2 OPT=-g DFLAG=_ld DEFS=-DDEBUG_SISCO # logging / debug
echo STARTING MAKE OF smpval_nd.a LIBRARY for $1 >> cc.lst 2>&1
make -f smpval.mak $2 OPT=-g DFLAG=_nd # no logging / debug
echo STARTING MAKE OF mvl_l.a LIBRARY for $1 >> cc.lst 2>&1
make -f mvl.mak $2 DFLAG=_l DEFS=-DDEBUG_SISCO # logging / no debug
echo STARTING MAKE OF mvl_n.a LIBRARY for $1 >> cc.lst 2>&1
make -f mvl.mak $2 DFLAG=_n # no logging / no debug
echo STARTING MAKE OF mvl_ld.a LIBRARY for $1 >> cc.lst 2>&1
make -f mvl.mak $2 OPT=-g DFLAG=_ld DEFS=-DDEBUG_SISCO # logging / debug
echo STARTING MAKE OF mvl_nd.a LIBRARY for $1 >> cc.lst 2>&1
make -f mvl.mak $2 OPT=-g DFLAG=_nd # no logging / debug
echo STARTING MAKE OF mvlu_l.a LIBRARY for $1 >> cc.lst 2>&1
make -f mvlu.mak $2 DFLAG=_l DEFS=-DDEBUG_SISCO # logging / no debug
echo STARTING MAKE OF mvlu_n.a LIBRARY for $1 >> cc.lst 2>&1
make -f mvlu.mak $2 DFLAG=_n # no logging / no debug
echo STARTING MAKE OF mvlu_ld.a LIBRARY for $1 >> cc.lst 2>&1
make -f mvlu.mak $2 OPT=-g DFLAG=_ld DEFS=-DDEBUG_SISCO # logging / debug
echo STARTING MAKE OF mvlu_nd.a LIBRARY for $1 >> cc.lst 2>&1
make -f mvlu.mak $2 OPT=-g DFLAG=_nd # no logging / debug
echo STARTING MAKE OF util_l.a LIBRARY for $1 >> cc.lst 2>&1
make -f util.mak $2 DFLAG=_l DEFS=-DDEBUG_SISCO # logging / no debug
echo STARTING MAKE OF util_n.a LIBRARY for $1 >> cc.lst 2>&1
make -f util.mak $2 DFLAG=_n # no logging / no debug
echo STARTING MAKE OF util_ld.a LIBRARY for $1 >> cc.lst 2>&1
make -f util.mak $2 OPT=-g DFLAG=_ld DEFS=-DDEBUG_SISCO # logging / debug
echo STARTING MAKE OF util_nd.a LIBRARY for $1 >> cc.lst 2>&1
make -f util.mak $2 OPT=-g DFLAG=_nd # no logging / debug
echo STARTING MAKE OF mlogl_l.a LIBRARY for $1 >> cc.lst 2>&1
make -f mlogl.mak $2 DFLAG=_l DEFS=-DDEBUG_SISCO # logging / no debug
echo STARTING MAKE OF mlogl_n.a LIBRARY for $1 >> cc.lst 2>&1
make -f mlogl.mak $2 DFLAG=_n # no logging / no debug
echo STARTING MAKE OF mlogl_ld.a LIBRARY for $1 >> cc.lst 2>&1
make -f mlogl.mak $2 OPT=-g DFLAG=_ld DEFS=-DDEBUG_SISCO # logging / debug
echo STARTING MAKE OF mlogl_nd.a LIBRARY for $1 >> cc.lst 2>&1
make -f mlogl.mak $2 OPT=-g DFLAG=_nd # no logging / debug
echo STARTING MAKE OF findalgn_ld EXECUTABLE for $1 >> cc.lst 2>&1
make -f findalgn.mak $2 OPT=-g DFLAG=_ld DEFS=-DDEBUG_SISCO # logging / debug
echo STARTING MAKE OF foundry_ld EXECUTABLE for $1 >> cc.lst 2>&1
make -f foundry.mak $2 OPT=-g DFLAG=_ld DEFS=-DDEBUG_SISCO # logging / debug
echo STARTING MAKE OF mmslog_ld EXECUTABLE for $1 >> cc.lst 2>&1
make -f mmslog.mak $2 OPT=-g DFLAG=_ld DEFS=-DDEBUG_SISCO # logging / debug
echo STARTING MAKE OF scl_srvr_ld EXECUTABLE for $1 >> cc.lst 2>&1
make -f scl_srvr.mak $2 OPT=-g DFLAG=_ld DEFS=-DDEBUG_SISCO # logging / debug
使用row_number（）查询以获取要加入的行
declare @t table(col1 int,col2 char(1),col3 char(2),col4 char(3))
insert @t values (30,'A','B1','ABC')
,(35,'A','A1','ABC')
,(36,'A',NULL,NULL)
,(40,'A','X1','ABC')
,(50,'B','M1','ABD')
结果：
select t.*, mx
from @t t
join (
select
col2,
case when col4='ABC' then col1 else 0 end as mx,
row_number() over (PARTITION BY col2 order by case when col3 is null then 1 else 0 end, col3) rn
from @t
) m on m.col2=t.col2 and rn=1