diff --git a/calc.go b/calc.go
index d9bf653c..1d4e96e1 100644
--- a/calc.go
+++ b/calc.go
@@ -315,9 +315,10 @@ type formulaFuncs struct {
 	sheet, cell string
 }
 
-// CalcCellValue provides a function to get calculated cell value. This
-// feature is currently in working processing. Array formula, table formula
-// and some other formulas are not supported currently.
+// CalcCellValue provides a function to get calculated cell value. This feature
+// is currently in working processing. Iterative calculation, implicit
+// intersection, explicit intersection, array formula, table formula and some
+// other formulas are not supported currently.
 //
 // Supported formula functions:
 //
@@ -421,6 +422,8 @@ type formulaFuncs struct {
 //    DAYS
 //    DAYS360
 //    DB
+//    DCOUNT
+//    DCOUNTA
 //    DDB
 //    DEC2BIN
 //    DEC2HEX
@@ -488,6 +491,7 @@ type formulaFuncs struct {
 //    HEX2OCT
 //    HLOOKUP
 //    HOUR
+//    HYPERLINK
 //    HYPGEOM.DIST
 //    HYPGEOMDIST
 //    IF
@@ -1602,12 +1606,18 @@ func formulaCriteriaEval(val string, criteria *formulaCriteria) (result bool, er
 	var value, expected float64
 	var e error
 	prepareValue := func(val, cond string) (value float64, expected float64, err error) {
+		percential := 1.0
+		if strings.HasSuffix(cond, "%") {
+			cond = strings.TrimSuffix(cond, "%")
+			percential /= 100
+		}
 		if value, err = strconv.ParseFloat(val, 64); err != nil {
 			return
 		}
-		if expected, err = strconv.ParseFloat(criteria.Condition, 64); err != nil {
+		if expected, err = strconv.ParseFloat(cond, 64); err != nil {
 			return
 		}
+		expected *= percential
 		return
 	}
 	switch criteria.Type {
@@ -17957,3 +17967,155 @@ func (fn *formulaFuncs) YIELDMAT(argsList *list.List) formulaArg {
 	result /= dsm.Number
 	return newNumberFormulaArg(result)
 }
+
+// Database Functions
+
+// calcDatabase defines the structure for formula database.
+type calcDatabase struct {
+	col, row int
+	indexMap map[int]int
+	database [][]formulaArg
+	criteria [][]formulaArg
+}
+
+// newCalcDatabase function returns formula database by given data range of
+// cells containing the database, field and criteria range.
+func newCalcDatabase(database, field, criteria formulaArg) *calcDatabase {
+	db := calcDatabase{
+		indexMap: make(map[int]int),
+		database: database.Matrix,
+		criteria: criteria.Matrix,
+	}
+	exp := len(database.Matrix) < 2 || len(database.Matrix[0]) < 1 ||
+		len(criteria.Matrix) < 2 || len(criteria.Matrix[0]) < 1
+	if field.Type != ArgEmpty {
+		if db.col = db.columnIndex(database.Matrix, field); exp || db.col < 0 || len(db.database[0]) <= db.col {
+			return nil
+		}
+		return &db
+	}
+	if db.col = -1; exp {
+		return nil
+	}
+	return &db
+}
+
+// columnIndex return index by specifies column field within the database for
+// which user want to return the count of non-blank cells.
+func (db *calcDatabase) columnIndex(database [][]formulaArg, field formulaArg) int {
+	num := field.ToNumber()
+	if num.Type != ArgNumber && len(database) > 0 {
+		for i := 0; i < len(database[0]); i++ {
+			if title := database[0][i]; strings.EqualFold(title.Value(), field.Value()) {
+				return i
+			}
+		}
+		return -1
+	}
+	return int(num.Number - 1)
+}
+
+// criteriaEval evaluate formula criteria expression.
+func (db *calcDatabase) criteriaEval() bool {
+	var (
+		columns, rows = len(db.criteria[0]), len(db.criteria)
+		criteria      = db.criteria
+		k             int
+		matched       bool
+	)
+	if len(db.indexMap) == 0 {
+		fields := criteria[0]
+		for j := 0; j < columns; j++ {
+			if k = db.columnIndex(db.database, fields[j]); k < 0 {
+				return false
+			}
+			db.indexMap[j] = k
+		}
+	}
+	for i := 1; !matched && i < rows; i++ {
+		matched = true
+		for j := 0; matched && j < columns; j++ {
+			criteriaExp := db.criteria[i][j].Value()
+			if criteriaExp == "" {
+				continue
+			}
+			criteria := formulaCriteriaParser(criteriaExp)
+			cell := db.database[db.row][db.indexMap[j]].Value()
+			matched, _ = formulaCriteriaEval(cell, criteria)
+		}
+	}
+	return matched
+}
+
+// value returns the current cell value.
+func (db *calcDatabase) value() formulaArg {
+	if db.col == -1 {
+		return db.database[db.row][len(db.database[db.row])-1]
+	}
+	return db.database[db.row][db.col]
+}
+
+// next will return true if find the matched cell in the database.
+func (db *calcDatabase) next() bool {
+	matched, rows := false, len(db.database)
+	for !matched && db.row < rows {
+		if db.row++; db.row < rows {
+			matched = db.criteriaEval()
+		}
+	}
+	return matched
+}
+
+// dcount is an implementation of the formula functions DCOUNT and DCOUNTA.
+func (fn *formulaFuncs) dcount(name string, argsList *list.List) formulaArg {
+	if argsList.Len() < 2 {
+		return newErrorFormulaArg(formulaErrorVALUE, fmt.Sprintf("%s requires at least 2 arguments", name))
+	}
+	if argsList.Len() > 3 {
+		return newErrorFormulaArg(formulaErrorVALUE, fmt.Sprintf("%s allows at most 3 arguments", name))
+	}
+	field := newEmptyFormulaArg()
+	criteria := argsList.Back().Value.(formulaArg)
+	if argsList.Len() > 2 {
+		field = argsList.Front().Next().Value.(formulaArg)
+	}
+	var count float64
+	database := argsList.Front().Value.(formulaArg)
+	db := newCalcDatabase(database, field, criteria)
+	if db == nil {
+		return newErrorFormulaArg(formulaErrorVALUE, formulaErrorVALUE)
+	}
+	for db.next() {
+		cell := db.value()
+		if cell.Value() == "" {
+			continue
+		}
+		if num := cell.ToNumber(); name == "DCOUNT" && num.Type != ArgNumber {
+			continue
+		}
+		count++
+	}
+	return newNumberFormulaArg(count)
+}
+
+// DOUNT function returns the number of cells containing numeric values, in a
+// field (column) of a database for selected records only. The records to be
+// included in the count are those that satisfy a set of one or more
+// user-specified criteria. The syntax of the function is:
+//
+//    DCOUNT(database,[field],criteria)
+//
+func (fn *formulaFuncs) DCOUNT(argsList *list.List) formulaArg {
+	return fn.dcount("DCOUNT", argsList)
+}
+
+// DCOUNTA function returns the number of non-blank cells, in a field
+// (column) of a database for selected records only. The records to be
+// included in the count are those that satisfy a set of one or more
+// user-specified criteria. The syntax of the function is:
+//
+//    DCOUNTA(database,[field],criteria)
+//
+func (fn *formulaFuncs) DCOUNTA(argsList *list.List) formulaArg {
+	return fn.dcount("DCOUNTA", argsList)
+}
diff --git a/calc_test.go b/calc_test.go
index b3eb1961..7cf9e487 100644
--- a/calc_test.go
+++ b/calc_test.go
@@ -4603,6 +4603,63 @@ func TestCalcCOVAR(t *testing.T) {
 	}
 }
 
+func TestCalcDCOUNTandDCOUNTA(t *testing.T) {
+	cellData := [][]interface{}{
+		{"Tree", "Height", "Age", "Yield", "Profit", "Height"},
+		{"=Apple", ">1000%", nil, nil, nil, "<16"},
+		{"=Pear"},
+		{"Tree", "Height", "Age", "Yield", "Profit"},
+		{"Apple", 18, 20, 14, 105},
+		{"Pear", 12, 12, 10, 96},
+		{"Cherry", 13, 14, 9, 105},
+		{"Apple", 14, nil, 10, 75},
+		{"Pear", 9, 8, 8, 77},
+		{"Apple", 12, 11, 6, 45},
+	}
+	f := prepareCalcData(cellData)
+	assert.NoError(t, f.SetCellFormula("Sheet1", "A2", "=\"=Apple\""))
+	assert.NoError(t, f.SetCellFormula("Sheet1", "A3", "=\"=Pear\""))
+	assert.NoError(t, f.SetCellFormula("Sheet1", "C8", "=NA()"))
+	formulaList := map[string]string{
+		"=DCOUNT(A4:E10,\"Age\",A1:F2)":     "1",
+		"=DCOUNT(A4:E10,,A1:F2)":            "2",
+		"=DCOUNT(A4:E10,\"Profit\",A1:F2)":  "2",
+		"=DCOUNT(A4:E10,\"Tree\",A1:F2)":    "0",
+		"=DCOUNT(A4:E10,\"Age\",A2:F3)":     "0",
+		"=DCOUNTA(A4:E10,\"Age\",A1:F2)":    "1",
+		"=DCOUNTA(A4:E10,,A1:F2)":           "2",
+		"=DCOUNTA(A4:E10,\"Profit\",A1:F2)": "2",
+		"=DCOUNTA(A4:E10,\"Tree\",A1:F2)":   "2",
+		"=DCOUNTA(A4:E10,\"Age\",A2:F3)":    "0",
+	}
+	for formula, expected := range formulaList {
+		assert.NoError(t, f.SetCellFormula("Sheet1", "A11", formula))
+		result, err := f.CalcCellValue("Sheet1", "A11")
+		assert.NoError(t, err, formula)
+		assert.Equal(t, expected, result, formula)
+	}
+	calcError := map[string]string{
+		"=DCOUNT()":                           "DCOUNT requires at least 2 arguments",
+		"=DCOUNT(A4:E10,\"Age\",A1:F2,\"\")":  "DCOUNT allows at most 3 arguments",
+		"=DCOUNT(A4,\"Age\",A1:F2)":           "#VALUE!",
+		"=DCOUNT(A4:E10,NA(),A1:F2)":          "#VALUE!",
+		"=DCOUNT(A4:E4,,A1:F2)":               "#VALUE!",
+		"=DCOUNT(A4:E10,\"x\",A2:F3)":         "#VALUE!",
+		"=DCOUNTA()":                          "DCOUNTA requires at least 2 arguments",
+		"=DCOUNTA(A4:E10,\"Age\",A1:F2,\"\")": "DCOUNTA allows at most 3 arguments",
+		"=DCOUNTA(A4,\"Age\",A1:F2)":          "#VALUE!",
+		"=DCOUNTA(A4:E10,NA(),A1:F2)":         "#VALUE!",
+		"=DCOUNTA(A4:E4,,A1:F2)":              "#VALUE!",
+		"=DCOUNTA(A4:E10,\"x\",A2:F3)":        "#VALUE!",
+	}
+	for formula, expected := range calcError {
+		assert.NoError(t, f.SetCellFormula("Sheet1", "A11", formula))
+		result, err := f.CalcCellValue("Sheet1", "A11")
+		assert.EqualError(t, err, expected, formula)
+		assert.Equal(t, "", result, formula)
+	}
+}
+
 func TestCalcFORMULATEXT(t *testing.T) {
 	f, formulaText := NewFile(), "=SUM(B1:C1)"
 	assert.NoError(t, f.SetCellFormula("Sheet1", "A1", formulaText))
diff --git a/crypt.go b/crypt.go
index 239208db..b00ccdf7 100644
--- a/crypt.go
+++ b/crypt.go
@@ -1226,10 +1226,10 @@ func (c *cfb) Writer(encryptionInfoBuffer, encryptedPackage []byte) []byte {
 	}
 	MSAT = c.writeMSAT(MSATBlocks, SATBlocks, MSAT)
 	blocks, SAT := c.writeSAT(MSATBlocks, SATBlocks, SSATBlocks, directoryBlocks, fileBlocks, streamBlocks, SAT)
-	storage.writeUint32(0xE011CFD0)
-	storage.writeUint32(0xE11AB1A1)
-	storage.writeUint64(0x00)
-	storage.writeUint64(0x00)
+	for i := 0; i < 8; i++ {
+		storage.writeBytes([]byte{oleIdentifier[i]})
+	}
+	storage.writeBytes(make([]byte, 16))
 	storage.writeUint16(0x003E)
 	storage.writeUint16(0x0003)
 	storage.writeUint16(-2)
diff --git a/go.mod b/go.mod
index b08e3d20..4d628fcf 100644
--- a/go.mod
+++ b/go.mod
@@ -8,11 +8,11 @@ require (
 	github.com/richardlehane/mscfb v1.0.4
 	github.com/richardlehane/msoleps v1.0.3 // indirect
 	github.com/stretchr/testify v1.7.1
-	github.com/xuri/efp v0.0.0-20220407160117-ad0f7a785be8
+	github.com/xuri/efp v0.0.0-20220603152613-6918739fd470
 	github.com/xuri/nfp v0.0.0-20220409054826-5e722a1d9e22
-	golang.org/x/crypto v0.0.0-20220525230936-793ad666bf5e
+	golang.org/x/crypto v0.0.0-20220622213112-05595931fe9d
 	golang.org/x/image v0.0.0-20220413100746-70e8d0d3baa9
-	golang.org/x/net v0.0.0-20220524220425-1d687d428aca
+	golang.org/x/net v0.0.0-20220624214902-1bab6f366d9e
 	golang.org/x/text v0.3.7
 	gopkg.in/yaml.v3 v3.0.0 // indirect
 )
diff --git a/go.sum b/go.sum
index db6f6ad1..3ffe3394 100644
--- a/go.sum
+++ b/go.sum
@@ -13,21 +13,21 @@ github.com/richardlehane/msoleps v1.0.3/go.mod h1:BWev5JBpU9Ko2WAgmZEuiz4/u3ZYTK
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/testify v1.7.1 h1:5TQK59W5E3v0r2duFAb7P95B6hEeOyEnHRa8MjYSMTY=
 github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
-github.com/xuri/efp v0.0.0-20220407160117-ad0f7a785be8 h1:3X7aE0iLKJ5j+tz58BpvIZkXNV7Yq4jC93Z/rbN2Fxk=
-github.com/xuri/efp v0.0.0-20220407160117-ad0f7a785be8/go.mod h1:ybY/Jr0T0GTCnYjKqmdwxyxn2BQf2RcQIIvex5QldPI=
+github.com/xuri/efp v0.0.0-20220603152613-6918739fd470 h1:6932x8ltq1w4utjmfMPVj09jdMlkY0aiA6+Skbtl3/c=
+github.com/xuri/efp v0.0.0-20220603152613-6918739fd470/go.mod h1:ybY/Jr0T0GTCnYjKqmdwxyxn2BQf2RcQIIvex5QldPI=
 github.com/xuri/nfp v0.0.0-20220409054826-5e722a1d9e22 h1:OAmKAfT06//esDdpi/DZ8Qsdt4+M5+ltca05dA5bG2M=
 github.com/xuri/nfp v0.0.0-20220409054826-5e722a1d9e22/go.mod h1:WwHg+CVyzlv/TX9xqBFXEZAuxOPxn2k1GNHwG41IIUQ=
-golang.org/x/crypto v0.0.0-20220525230936-793ad666bf5e h1:T8NU3HyQ8ClP4SEE+KbFlg6n0NhuTsN4MyznaarGsZM=
-golang.org/x/crypto v0.0.0-20220525230936-793ad666bf5e/go.mod h1:IxCIyHEi3zRg3s0A5j5BB6A9Jmi73HwBIUl50j+osU4=
+golang.org/x/crypto v0.0.0-20220622213112-05595931fe9d h1:sK3txAijHtOK88l68nt020reeT1ZdKLIYetKl95FzVY=
+golang.org/x/crypto v0.0.0-20220622213112-05595931fe9d/go.mod h1:IxCIyHEi3zRg3s0A5j5BB6A9Jmi73HwBIUl50j+osU4=
 golang.org/x/image v0.0.0-20220413100746-70e8d0d3baa9 h1:LRtI4W37N+KFebI/qV0OFiLUv4GLOWeEW5hn/KEJvxE=
 golang.org/x/image v0.0.0-20220413100746-70e8d0d3baa9/go.mod h1:023OzeP/+EPmXeapQh35lcL3II3LrY8Ic+EFFKVhULM=
 golang.org/x/net v0.0.0-20211112202133-69e39bad7dc2/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
-golang.org/x/net v0.0.0-20220524220425-1d687d428aca h1:xTaFYiPROfpPhqrfTIDXj0ri1SpfueYT951s4bAuDO8=
-golang.org/x/net v0.0.0-20220524220425-1d687d428aca/go.mod h1:CfG3xpIq0wQ8r1q4Su4UZFWDARRcnwPjda9FqA0JpMk=
+golang.org/x/net v0.0.0-20220624214902-1bab6f366d9e h1:TsQ7F31D3bUCLeqPT0u+yjp1guoArKaNKmCr22PYgTQ=
+golang.org/x/net v0.0.0-20220624214902-1bab6f366d9e/go.mod h1:XRhObCWvk6IyKnWLug+ECip1KBveYUHfp+8e9klMJ9c=
 golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210423082822-04245dca01da/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.0.0-20211216021012-1d35b9e2eb4e/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20220520151302-bc2c85ada10a/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
 golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
 golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=