diff --git a/lib/make/makeProjectionExpressionPart.js b/lib/make/makeProjectionExpressionPart.js
index 1f29f98..092de87 100644
--- a/lib/make/makeProjectionExpressionPart.js
+++ b/lib/make/makeProjectionExpressionPart.js
@@ -11,7 +11,6 @@ exports.makeProjectionExpressionPart = makeProjectionExpressionPart;
 
 /**
  * Makes a projection expression sub part.
- *
  * @param {import('../types').Expression} expr - the expression to make a projection from
  * @param {import('../types').NoqlContext} context - The Noql context to use when generating the output
  * @param {number} [depth] - the current recursive depth
@@ -124,6 +123,9 @@ function makeArg(expr, depth, context) {
     if (expr.type === 'case') {
         return makeCaseConditionModule.makeCaseCondition(expr, context);
     }
+    if (expr.type === 'double_quote_string') {
+        return `$${expr.value}`;
+    }
     if (expr.value !== undefined) {
         return {$literal: expr.value};
     }
diff --git a/package.json b/package.json
index 1ddabe4..29467e1 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@synatic/noql",
-  "version": "4.2.5",
+  "version": "4.2.6",
   "description": "Convert SQL statements to mongo queries or aggregates",
   "main": "index.js",
   "files": [
diff --git a/test/bug-fix-tests/bug-fix.json b/test/bug-fix-tests/bug-fix.json
index 55988d1..8593321 100644
--- a/test/bug-fix-tests/bug-fix.json
+++ b/test/bug-fix-tests/bug-fix.json
@@ -1333,5 +1333,47 @@
         }
       ]
     }
+  },
+  "ifNull": {
+    "case-1": {
+      "expectedResults": [
+        {
+          "SKU": "almonds"
+        },
+        {
+          "SKU": "Not Specified"
+        }
+      ]
+    },
+    "case-2": {
+      "expectedResults": [
+        {
+          "SKU": "almonds"
+        },
+        {
+          "SKU": "Not Specified"
+        }
+      ]
+    },
+    "case-3": {
+      "expectedResults": [
+        {
+          "City": "Sasebo"
+        },
+        {
+          "City": "Not Specified"
+        }
+      ]
+    },
+    "case-4": {
+      "expectedResults": [
+        {
+          "SKU": "almonds"
+        },
+        {
+          "SKU": "Not Specified"
+        }
+      ]
+    }
   }
 }
\ No newline at end of file
diff --git a/test/bug-fix-tests/bug-fix.test.js b/test/bug-fix-tests/bug-fix.test.js
index dec157f..d26d5ca 100644
--- a/test/bug-fix-tests/bug-fix.test.js
+++ b/test/bug-fix-tests/bug-fix.test.js
@@ -3095,4 +3095,188 @@ order by CurrentDv asc , SQ asc`;
             });
         });
     });
+
+    describe('ifNull', () => {
+        it('should handle ifNull for a simple statement', async () => {
+            const sql = `
+                SELECT ifNull(sku, 'Not Specified') as SKU
+                FROM inventory
+                WHERE id in (1,5)`;
+            const {pipeline, results} = await queryResultTester({
+                queryString: sql,
+                casePath: 'ifNull.case-1',
+                mode,
+                unsetId: true,
+            });
+            assert.deepStrictEqual(results, [
+                {
+                    SKU: 'almonds',
+                },
+                {
+                    SKU: 'Not Specified',
+                },
+            ]);
+            assert.deepStrictEqual(pipeline, [
+                {
+                    $match: {
+                        id: {
+                            $in: [1, 5],
+                        },
+                    },
+                },
+                {
+                    $project: {
+                        SKU: {
+                            $ifNull: [
+                                '$sku',
+                                {
+                                    $literal: 'Not Specified',
+                                },
+                            ],
+                        },
+                    },
+                },
+                {
+                    $unset: '_id',
+                },
+            ]);
+        });
+        it('should handle ifNull for a simple statement with a table alias', async () => {
+            const sql = `
+                SELECT ifNull(i.sku, 'Not Specified') as SKU
+                FROM inventory i
+                WHERE id in (1,5)`;
+            const {pipeline, results} = await queryResultTester({
+                queryString: sql,
+                casePath: 'ifNull.case-2',
+                mode,
+                unsetId: true,
+            });
+            assert.deepStrictEqual(results, [
+                {
+                    SKU: 'almonds',
+                },
+                {
+                    SKU: 'Not Specified',
+                },
+            ]);
+            assert.deepStrictEqual(pipeline, [
+                {
+                    $project: {
+                        i: '$$ROOT',
+                    },
+                },
+                {
+                    $match: {
+                        'i.id': {
+                            $in: [1, 5],
+                        },
+                    },
+                },
+                {
+                    $project: {
+                        SKU: {
+                            $ifNull: [
+                                '$i.sku',
+                                {
+                                    $literal: 'Not Specified',
+                                },
+                            ],
+                        },
+                    },
+                },
+                {
+                    $unset: '_id',
+                },
+            ]);
+        });
+        it('should handle ifNull for a simple statement with a nested field', async () => {
+            const sql = `
+                SELECT ifNull(Address.City, 'Not Specified') as City
+                FROM customers
+                WHERE id in (1,599)`;
+            const {pipeline, results} = await queryResultTester({
+                queryString: sql,
+                casePath: 'ifNull.case-3',
+                mode,
+                unsetId: true,
+            });
+            assert.deepStrictEqual(results, [
+                {
+                    City: 'Sasebo',
+                },
+                {
+                    City: 'Not Specified',
+                },
+            ]);
+            assert.deepStrictEqual(pipeline, [
+                {
+                    $match: {
+                        id: {
+                            $in: [1, 599],
+                        },
+                    },
+                },
+                {
+                    $project: {
+                        City: {
+                            $ifNull: [
+                                '$Address.City',
+                                {
+                                    $literal: 'Not Specified',
+                                },
+                            ],
+                        },
+                    },
+                },
+                {
+                    $unset: '_id',
+                },
+            ]);
+        });
+        it('should handle ifNull for a simple statement with double quotes', async () => {
+            const sql = `
+                SELECT ifNull("sku", 'Not Specified') as SKU
+                FROM inventory
+                WHERE id in (1,5)`;
+            const {pipeline, results} = await queryResultTester({
+                queryString: sql,
+                casePath: 'ifNull.case-4',
+                mode,
+                unsetId: true,
+            });
+            assert.deepStrictEqual(results, [
+                {
+                    SKU: 'almonds',
+                },
+                {
+                    SKU: 'Not Specified',
+                },
+            ]);
+            assert.deepStrictEqual(pipeline, [
+                {
+                    $match: {
+                        id: {
+                            $in: [1, 5],
+                        },
+                    },
+                },
+                {
+                    $project: {
+                        SKU: {
+                            $ifNull: [
+                                '$sku',
+                                {
+                                    $literal: 'Not Specified',
+                                },
+                            ],
+                        },
+                    },
+                },
+                {
+                    $unset: '_id',
+                },
+            ]);
+        });
+    });
 });
diff --git a/test/exampleData/customers.json b/test/exampleData/customers.json
index 575e6a0..8d293b6 100644
--- a/test/exampleData/customers.json
+++ b/test/exampleData/customers.json
@@ -1,6 +1,6 @@
 [
   {
-    "_id":"61b0fdcbdee485f7c0682db6",
+    "_id": "61b0fdcbdee485f7c0682db6",
     "Address": {
       "Address": "1913 Hanoi Way",
       "City": "Sasebo",
@@ -248750,7 +248750,6 @@
   {
     "Address": {
       "Address": "1325 Fukuyama Street",
-      "City": "Tieli",
       "Country": "China",
       "District": "Heilongjiang"
     },
diff --git a/test/individualTests/upgrade.test.js b/test/individualTests/upgrade.test.js
index 20755ac..4e7eabf 100644
--- a/test/individualTests/upgrade.test.js
+++ b/test/individualTests/upgrade.test.js
@@ -307,7 +307,7 @@ describe('node-sql-parser upgrade tests', function () {
                 SELECT  id,
                         item,
                         orderDate as od1,
-                        date_add(orderDate,'hour',2,"America/New_York") as od2,
+                        date_add(orderDate,'hour',2,'America/New_York') as od2,
                         unset(_id)
                 FROM orders
                 WHERE id=2
@@ -345,7 +345,7 @@ describe('node-sql-parser upgrade tests', function () {
                 SELECT  id,
                         item,
                         orderDate as od1,
-                        date_subtract(orderDate,'hour',2,"America/New_York") as od2,
+                        date_subtract(orderDate,'hour',2,'America/New_York') as od2,
                         unset(_id)
                 FROM orders
                 WHERE id=2