diff --git a/DBSyn/App.swift b/DBSyn/App.swift
index dfe2489..3b28257 100644
--- a/DBSyn/App.swift
+++ b/DBSyn/App.swift
@@ -224,13 +224,14 @@ struct WorkbenchSettingsView: View {
             .font(.system(size: 12))
             .foregroundStyle(.secondary)
             .frame(maxWidth: .infinity, alignment: .leading)
-            .padding(.leading, 190)
+            .padding(.leading, 186)
 
             Divider()
                 .padding(.vertical, 12)
 
             Text("Examples")
                 .font(.headline)
+                .frame(maxWidth: .infinity, alignment: .leading)
 
             Text(
                 "500 rows: Faster browsing and lower memory usage.\n" +
@@ -284,10 +285,22 @@ struct WorkbenchSettingsView: View {
                     Text("Light").tag("light")
                     Text("Dark").tag("dark")
                 }
+                .pickerStyle(.segmented)
                 .labelsHidden()
-                .frame(width: 170)
+                .accessibilityLabel("Application appearance")
+                .frame(width: 260, alignment: .leading)
             }
 
+            Text(appearance == "system"
+                 ? "DBSyn follows your Mac’s appearance setting."
+                 : appearance == "light"
+                 ? "DBSyn always uses Light appearance."
+                 : "DBSyn always uses Dark appearance.")
+                .font(.caption)
+                .foregroundStyle(.secondary)
+                .frame(maxWidth: .infinity, alignment: .leading)
+                .padding(.leading, 186)
+
             settingsRow("Navigator") {
                 Toggle(
                     "Automatically expand table folders",
@@ -327,7 +340,7 @@ struct WorkbenchSettingsView: View {
 
             Text(title)
                 .font(.system(size: 13))
-                .frame(width: 170, alignment: .trailing)
+                .frame(width: 170, alignment: .leading)
 
             content()
 
diff --git a/DBSyn/DatabaseModel.swift b/DBSyn/DatabaseModel.swift
index 3bb589f..e3735b8 100644
--- a/DBSyn/DatabaseModel.swift
+++ b/DBSyn/DatabaseModel.swift
@@ -455,27 +455,42 @@ final class DatabaseModel: ObservableObject {
     }
     private func execute(_ statement: String, listingDatabases: Bool) {
         guard let profile = selected else { status = "Select a connection"; return }
-        guard !statement.trimmingCharacters(in: .whitespacesAndNewlines).isEmpty else { return }
+        let statements = listingDatabases ? [statement] : SQLStatementSplitter.split(statement)
+        guard !statements.isEmpty else { return }
         isRunning = true
         if !listingDatabases { queryDurationText = "Running…" }
         let queryStarted = Date()
-        status = "Connecting…"
-        let activeDB = listingDatabases ? "" : (selectedDatabase.isEmpty ? profile.database : selectedDatabase)
+        status = "Executing…"
         let password = PasswordStore.read(profile.id)
         Task {
+            var activeDB = listingDatabases ? "" : (selectedDatabase.isEmpty ? profile.database : selectedDatabase)
             do {
-                let parsed = try await NativeMySQLRunner.run(profile: profile, database: activeDB, password: password, sql: statement)
+                var lastResult = QueryResult()
+                for item in statements {
+                    // Each query is sent separately: COM_QUERY accepts one SQL
+                    // statement, not an entire semicolon-separated editor buffer.
+                    let parsed = try await NativeMySQLRunner.run(
+                        profile: profile, database: activeDB, password: password, sql: item
+                    )
+                    lastResult = parsed
+                    if let usedSchema = SQLStatementSplitter.usedDatabase(item) {
+                        activeDB = usedSchema
+                        selectedDatabase = usedSchema
+                        // Metadata is cached in memory for native SQL completion.
+                        loadTables(database: usedSchema)
+                    }
+                }
                 if listingDatabases {
-                    databases = parsed.rows.compactMap { $0.first }
+                    databases = lastResult.rows.compactMap { $0.first }
                     status = "Connected to \(profile.name)"
                 } else {
-                    result = parsed
+                    result = lastResult
                     if let id = activeQueryID,
                        let index = queryTabs.firstIndex(where: { $0.id == id }) {
                         queryTabs[index].sql = sql
-                        queryTabs[index].result = parsed
+                        queryTabs[index].result = lastResult
                     }
-                    status = "Query completed (\(parsed.rows.count) rows)"
+                    status = "Executed \(statements.count) statement(s) (\(lastResult.rows.count) rows)"
                     recordQuery(statement, profile: profile, database: activeDB, succeeded: true, detail: status)
                 }
             } catch {
@@ -491,9 +506,72 @@ final class DatabaseModel: ObservableObject {
             isRunning = false
         }
     }
+
 }
 
 
+// Splits editor scripts without splitting semicolons inside quoted values or comments.
+private enum SQLStatementSplitter {
+    static func split(_ source: String) -> [String] {
+        let chars = Array(source)
+        var output: [String] = []
+        var current = ""
+        var state = 0 // 0 normal, 1 single quote, 2 double quote, 3 identifier, 4 line comment, 5 block comment
+        var i = 0
+        while i < chars.count {
+            let c = chars[i]
+            let next = i + 1 < chars.count ? chars[i + 1] : "\0"
+            if state == 4 {
+                if c == "\n" || c == "\r" { state = 0; current.append(" ") }
+                i += 1; continue
+            }
+            if state == 5 {
+                if c == "*" && next == "/" { state = 0; i += 2; current.append(" ") }
+                else { i += 1 }
+                continue
+            }
+            if state == 0 {
+                if c == "#" || (c == "-" && next == "-" && (i + 2 == chars.count || chars[i + 2].isWhitespace)) {
+                    state = 4; i += c == "#" ? 1 : 2; continue
+                }
+                if c == "/" && next == "*" { state = 5; i += 2; continue }
+                if c == "'" { state = 1 }
+                else if c == "\"" { state = 2 }
+                else if c == "`" { state = 3 }
+                else if c == ";" {
+                    let trimmed = current.trimmingCharacters(in: .whitespacesAndNewlines)
+                    if !trimmed.isEmpty { output.append(trimmed) }
+                    current = ""; i += 1; continue
+                }
+            } else {
+                if c == "\\" && state != 3 && i + 1 < chars.count {
+                    current.append(c); current.append(next); i += 2; continue
+                }
+                if (state == 1 && c == "'") || (state == 2 && c == "\"") || (state == 3 && c == "`") {
+                    if next == c { current.append(c); current.append(next); i += 2; continue }
+                    state = 0
+                }
+            }
+            current.append(c); i += 1
+        }
+        let trimmed = current.trimmingCharacters(in: .whitespacesAndNewlines)
+        if !trimmed.isEmpty { output.append(trimmed) }
+        return output
+    }
+
+    static func usedDatabase(_ statement: String) -> String? {
+        let pattern = #"(?is)^\s*USE\s+(?:`((?:``|[^`])+)`|([A-Za-z0-9_$]+))\s*$"#
+        guard let regex = try? NSRegularExpression(pattern: pattern),
+              let match = regex.firstMatch(in: statement, range: NSRange(statement.startIndex..., in: statement)) else { return nil }
+        for index in [1, 2] where match.range(at: index).location != NSNotFound {
+            if let range = Range(match.range(at: index), in: statement) {
+                return String(statement[range]).replacingOccurrences(of: "``", with: "`")
+            }
+        }
+        return nil
+    }
+}
+
 // MARK: - SQL Keyword Formatter
 
 enum SQLFormatter {
diff --git a/DBSyn/MainView.swift b/DBSyn/MainView.swift
index cd3f067..dbfb0fe 100644
--- a/DBSyn/MainView.swift
+++ b/DBSyn/MainView.swift
@@ -1546,6 +1546,14 @@ struct SQLTextView: NSViewRepresentable {
                 }
             }
 
+            // MySQL # comments are muted, including the entire line.
+            if let comments = try? NSRegularExpression(pattern: #"(?m)^[ \t]*#.*$"#) {
+                for match in comments.matches(in: editor.string, range: range) {
+                    storage.addAttribute(.foregroundColor,
+                                         value: NSColor.secondaryLabelColor,
+                                         range: match.range)
+                }
+            }
             storage.endEditing()
         }
     }
diff --git a/docs/PHASE61-2-APPEARANCE-SETTINGS.md b/docs/PHASE61-2-APPEARANCE-SETTINGS.md
new file mode 100644
index 0000000..af7847f
--- /dev/null
+++ b/docs/PHASE61-2-APPEARANCE-SETTINGS.md
@@ -0,0 +1,3 @@
+# Phase 61.2 — Appearance selector
+
+Settings → General now has a prominent segmented control for System, Light, and Dark. Changes apply immediately and persist through `preferences.appearance`.