diff --git a/apps/desktop/src/lib/__tests__/sql/sqlParameters.spec.ts b/apps/desktop/src/lib/__tests__/sql/sqlParameters.spec.ts
index 746c6354b..74068fff5 100644
--- a/apps/desktop/src/lib/__tests__/sql/sqlParameters.spec.ts
+++ b/apps/desktop/src/lib/__tests__/sql/sqlParameters.spec.ts
@@ -321,6 +321,30 @@ describe("extractSqlParameters", () => {
     expect(extractSqlParameters(sql, { databaseType: "duckdb" })).toEqual(["column", "nested_column", "later"]);
   });
 
+  it("ignores compact DuckDB prefix alias separators", () => {
+    const sql = 'select total:price * quantity, "order":sum(amount) from sales';
+
+    expect(extractSqlParameters(sql, { databaseType: "duckdb" })).toEqual([]);
+    expect(substituteSqlParameters(sql, {}, { databaseType: "duckdb" })).toBe(sql);
+    expect(extractSqlParameters(sql, { databaseType: "postgres" })).toEqual(["price", "sum"]);
+  });
+
+  it("keeps named parameters inside DuckDB prefix alias expressions", () => {
+    const sql = "from r:range(:row_count) select total:r.range + :offset";
+
+    expect(extractSqlParameters(sql, { databaseType: "duckdb" })).toEqual(["row_count", "offset"]);
+    expect(
+      substituteSqlParameters(
+        sql,
+        {
+          row_count: { kind: "number", value: "3" },
+          offset: { kind: "number", value: "10" },
+        },
+        { databaseType: "duckdb" },
+      ),
+    ).toBe("from r:range(3) select total:r.range + 10");
+  });
+
   it("ignores Doris VARIANT field type separators", () => {
     const sql = `
       create table \`events\` (
diff --git a/apps/desktop/src/lib/sql/sqlParameters.ts b/apps/desktop/src/lib/sql/sqlParameters.ts
index 428588c6b..48aa42316 100644
--- a/apps/desktop/src/lib/sql/sqlParameters.ts
+++ b/apps/desktop/src/lib/sql/sqlParameters.ts
@@ -176,7 +176,7 @@ function findSqlParameterOccurrences(sql: string, options?: SqlParameterOptions)
     }
     if (ch === ":" && supportsNamedParameters && isSyntaxEnabled("named")) {
       const name = readParameterName(sql, i + 1);
-      if (name && sql[i - 1] !== ":" && sql[i + 1] !== "=" && !complexTypeFieldSeparators.has(i) && !duckDbStructFieldSeparators.has(i) && !triggerPseudoRecordFieldStarts.has(i)) {
+      if (name && sql[i - 1] !== ":" && sql[i + 1] !== "=" && !complexTypeFieldSeparators.has(i) && !duckDbStructFieldSeparators.has(i) && !isDuckDbCompactPrefixAliasSeparator(sql, i, options?.databaseType) && !triggerPseudoRecordFieldStarts.has(i)) {
         occurrences.push({
           key: name,
           name,
@@ -230,6 +230,12 @@ function findSqlParameterOccurrences(sql: string, options?: SqlParameterOptions)
   return occurrences;
 }
 
+function isDuckDbCompactPrefixAliasSeparator(sql: string, index: number, databaseType?: DatabaseType): boolean {
+  if (databaseType !== "duckdb") return false;
+  const previous = sql[index - 1] ?? "";
+  return PARAMETER_NAME_CHAR_RE.test(previous) || previous === '"';
+}
+
 function isOracleDatabaseLinkMarker(sql: string, index: number, databaseType: DatabaseType | undefined): boolean {
   if (databaseType !== "oracle" || index === 0) return false;
   const previous = sql[index - 1];