diff --git a/apps/desktop/src/lib/__tests__/sql/sqlSelectionCase.spec.ts b/apps/desktop/src/lib/__tests__/sql/sqlSelectionCase.spec.ts
index 3b27863176..f692bfd2bc 100644
--- a/apps/desktop/src/lib/__tests__/sql/sqlSelectionCase.spec.ts
+++ b/apps/desktop/src/lib/__tests__/sql/sqlSelectionCase.spec.ts
@@ -14,11 +14,18 @@ describe("convertSqlSelectionCase", () => {
     expect(convertSqlSelectionCase(sql, { from: 0, to: sql.length }, "upper")).toBe("SELECT CODE FROM ORDERS WHERE CODE = 'abc001'");
   });
 
-  it("preserves the selected fragment when the selection is inside a string literal", () => {
+  it("converts a selection that is fully contained inside a string literal", () => {
     const sql = "select * from orders where code = 'AbC001'";
     const from = sql.indexOf("bC");
 
-    expect(convertSqlSelectionCase(sql, { from, to: from + 2 }, "lower")).toBe("bC");
+    expect(convertSqlSelectionCase(sql, { from, to: from + 2 }, "lower")).toBe("bc");
+  });
+
+  it("still protects a string literal when the selection extends beyond it", () => {
+    const sql = "select code from orders where code = 'abc001'";
+    const from = sql.indexOf("code =");
+
+    expect(convertSqlSelectionCase(sql, { from, to: sql.length }, "upper")).toBe("CODE = 'abc001'");
   });
 
   it("preserves PostgreSQL dollar-quoted string literals", () => {
diff --git a/apps/desktop/src/lib/sql/sqlSelectionCase.ts b/apps/desktop/src/lib/sql/sqlSelectionCase.ts
index b910be0b44..195be1034a 100644
--- a/apps/desktop/src/lib/sql/sqlSelectionCase.ts
+++ b/apps/desktop/src/lib/sql/sqlSelectionCase.ts
@@ -23,6 +23,14 @@ export function convertSqlSelectionCase(sql: string, range: SqlSelectionRange, m
   });
   if (protectedTokens.length === 0) return convertCase(sql.slice(from, to), mode);
 
+  // A selection fully contained inside one protected token (e.g. the user selected only
+  // text inside a string literal) carries no risk of collateral damage to surrounding SQL,
+  // so honor the explicit request instead of silently no-oping it.
+  const [only] = protectedTokens;
+  if (protectedTokens.length === 1 && only.span.start <= from && to <= only.span.end) {
+    return convertCase(sql.slice(from, to), mode);
+  }
+
   let converted = "";
   let cursor = from;
   for (const item of protectedTokens) {