Index: trunk/ippTools/share/Makefile.am
===================================================================
--- trunk/ippTools/share/Makefile.am	(revision 28411)
+++ trunk/ippTools/share/Makefile.am	(revision 28412)
@@ -338,3 +338,4 @@
 	diffphottool_pending.sql \
 	diffphottool_advance.sql \
-	diffphottool_revert.sql
+	diffphottool_revert.sql \
+	diffphottool_data.sql
Index: trunk/ippTools/share/diffphottool_data.sql
===================================================================
--- trunk/ippTools/share/diffphottool_data.sql	(revision 28412)
+++ trunk/ippTools/share/diffphottool_data.sql	(revision 28412)
@@ -0,0 +1,60 @@
+SELECT DISTINCT
+    diffPhotSkyfile.*,
+    diffRun.tess_id,
+    diffPhotRun.state,
+    diffPhotRun.workdir,
+    diffPhotRun.label,
+    diffRun.bothways,
+    diffRun.diff_mode,
+    -- The following are only valid for warps
+    -- XXX This needs to be more clever to handle diffs between stacks
+    -- Zero points are appropriate for both forward and backward diffs
+    camProcessedInput.zpt_obs,
+    camProcessedInput.zpt_stdev,
+    camProcessedInput.zpt_lq,
+    camProcessedInput.zpt_uq,
+    rawInput.comment,
+    rawInput.exp_time,
+    rawInput.camera,
+    rawInput.exp_name AS exp_name_1,
+    rawInput.exp_id AS exp_id_1,
+    chipInput.chip_id AS chip_id_1,
+    camInput.cam_id AS cam_id_1,
+    fakeInput.fake_id AS fake_id_1,
+    camProcessedInput.sigma_ra AS sigma_ra_1,
+    camProcessedInput.sigma_dec AS sigma_dec_1,
+    rawTemplate.exp_name AS exp_name_2,
+    rawTemplate.exp_id AS exp_id_2,
+    chipTemplate.chip_id AS chip_id_2,
+    camTemplate.cam_id AS cam_id_2,
+    fakeTemplate.fake_id AS fake_id_2,
+    camProcessedTemplate.sigma_ra AS sigma_ra_2,
+    camProcessedTemplate.sigma_dec AS sigma_dec_2
+FROM diffPhotRun
+JOIN diffPhotSkyfile USING(diff_phot_id)
+JOIN diffRun USING(diff_id)
+JOIN diffInputSkyfile USING(diff_id, skycell_id)
+LEFT JOIN warpRun AS warpInput
+    ON warpInput.warp_id = diffInputSkyfile.warp1
+LEFT JOIN fakeRun AS fakeInput
+    ON fakeInput.fake_id = warpInput.fake_id
+LEFT JOIN camRun AS camInput
+    ON camInput.cam_id = fakeInput.cam_id
+LEFT JOIN camProcessedExp AS camProcessedInput
+    ON camProcessedInput.cam_id = camInput.cam_id
+LEFT JOIN chipRun AS chipInput
+    ON chipInput.chip_id = camInput.chip_id
+LEFT JOIN rawExp AS rawInput
+    ON rawInput.exp_id = chipInput.exp_id
+LEFT JOIN warpRun AS warpTemplate
+    ON warpTemplate.warp_id = diffInputSkyfile.warp2
+LEFT JOIN fakeRun AS fakeTemplate
+    ON fakeTemplate.fake_id = warpTemplate.fake_id
+LEFT JOIN camRun AS camTemplate
+    ON camTemplate.cam_id = fakeTemplate.cam_id
+LEFT JOIN camProcessedExp AS camProcessedTemplate
+    ON camProcessedTemplate.cam_id = camTemplate.cam_id
+LEFT JOIN chipRun AS chipTemplate
+    ON chipTemplate.chip_id = camTemplate.chip_id
+LEFT JOIN rawExp AS rawTemplate
+    ON rawTemplate.exp_id = chipTemplate.exp_id
Index: trunk/ippTools/src/diffphottool.c
===================================================================
--- trunk/ippTools/src/diffphottool.c	(revision 28411)
+++ trunk/ippTools/src/diffphottool.c	(revision 28412)
@@ -38,4 +38,5 @@
 static bool advanceMode(pxConfig *config);
 static bool revertMode(pxConfig *config);
+static bool dataMode(pxConfig *config);
 
 # define MODECASE(caseName, func) \
@@ -64,4 +65,5 @@
         MODECASE(DIFFPHOTTOOL_MODE_ADVANCE,   advanceMode);
         MODECASE(DIFFPHOTTOOL_MODE_REVERT,    revertMode);
+        MODECASE(DIFFPHOTTOOL_MODE_DATA,      dataMode);
 
         default:
@@ -490,2 +492,61 @@
 }
 
+static bool dataMode(pxConfig *config)
+{
+    PS_ASSERT_PTR_NON_NULL(config, false);
+
+    psMetadata *where = psMetadataAlloc();
+
+    PXOPT_COPY_S64(config->args, where,  "-diff_phot_id", "diff_phot_id", "==");
+    PXOPT_COPY_STR(config->args, where, "-skycell_id", "skycell_id", "==");
+
+    PXOPT_LOOKUP_U64(limit, config->args, "-limit", false, false);
+    PXOPT_LOOKUP_BOOL(simple, config->args, "-simple", false);
+
+    psString query = pxDataGet("diffphottool_data.sql");
+    if (!query) {
+        psError(PXTOOLS_ERR_SYS, false, "failed to retreive SQL statement");
+        return false;
+    }
+
+    if (psListLength(where->list)) {
+        psString clause = psDBGenerateWhereConditionSQL(where, NULL);
+        psStringAppend(&query, "\nWHERE %s", clause);
+        psFree(clause);
+    }
+    psFree(where);
+
+    if (limit) {
+        psString limitString = psDBGenerateLimitSQL(limit);
+        psStringAppend(&query, "\n%s", limitString);
+        psFree(limitString);
+    }
+
+    if (!p_psDBRunQuery(config->dbh, query)) {
+        psError(psErrorCodeLast(), false, "database error");
+        psFree(query);
+        return false;
+    }
+    psFree(query);
+
+    psArray *output = p_psDBFetchResult(config->dbh);
+    if (!output) {
+        psError(psErrorCodeLast(), false, "database error");
+        return false;
+    }
+    if (!psArrayLength(output)) {
+        psTrace("diffphottool", PS_LOG_INFO, "no rows found");
+        psFree(output);
+        return true;
+    }
+
+    if (!ippdbPrintMetadatas(stdout, output, "diffPhotSkyfile", !simple)) {
+        psError(psErrorCodeLast(), false, "failed to print array");
+        psFree(output);
+        return false;
+    }
+    psFree(output);
+
+    return true;
+}
+
Index: trunk/ippTools/src/diffphottool.h
===================================================================
--- trunk/ippTools/src/diffphottool.h	(revision 28411)
+++ trunk/ippTools/src/diffphottool.h	(revision 28412)
@@ -32,4 +32,5 @@
     DIFFPHOTTOOL_MODE_ADVANCE,
     DIFFPHOTTOOL_MODE_REVERT,
+    DIFFPHOTTOOL_MODE_DATA,
 } diffphottoolMode;
 
Index: trunk/ippTools/src/diffphottoolConfig.c
===================================================================
--- trunk/ippTools/src/diffphottoolConfig.c	(revision 28411)
+++ trunk/ippTools/src/diffphottoolConfig.c	(revision 28412)
@@ -115,4 +115,11 @@
     psMetadataAddBool(revertArgs, PS_LIST_TAIL, "-all", 0, "allow no search terms", 0);
 
+    // -data
+    psMetadata *dataArgs = psMetadataAlloc();
+    psMetadataAddS64(dataArgs, PS_LIST_TAIL, "-diff_phot_id", 0, "search by diffphot ID", 0);
+    psMetadataAddStr(dataArgs, PS_LIST_TAIL, "-skycell_id", 0, "search by skycell ID", NULL);
+    psMetadataAddU64(dataArgs, PS_LIST_TAIL, "-limit", 0, "limit result set to N items", 0);
+    psMetadataAddBool(dataArgs, PS_LIST_TAIL, "-simple", 0, "use the simple output format", false);
+
     psFree(now);
 
@@ -127,4 +134,5 @@
     PXOPT_ADD_MODE("-advance",   "", DIFFPHOTTOOL_MODE_ADVANCE,   advanceArgs);
     PXOPT_ADD_MODE("-revert",    "", DIFFPHOTTOOL_MODE_REVERT,    revertArgs);
+    PXOPT_ADD_MODE("-data",      "", DIFFPHOTTOOL_MODE_DATA,      dataArgs);
 
     if (!pxGetOptions(stderr, argc, argv, config, modes, argSets)) {