fix(import): use SQL Server float for decimal inference

Refs: #4072

apps/desktop/src/lib/__tests__/table/tableImport.spec.ts

@@ -4,6 +4,7 @@ import {
   buildTableImportParseOptions,
   defaultTableImportEmptyStringAsNull,
   formatTableImportElapsed,
+  importDataTypeForDatabase,
   nextTableImportWizardStep,
   previousTableImportWizardStep,
   requiredImportTargetColumns,
@@ -131,4 +132,18 @@ describe("tableImport", () => {
       created_at: "DATETIME",
     });
   });
+
+  it("uses SQL Server FLOAT for inferred decimal columns", () => {
+    expect(suggestImportTargetDataTypes(["id", "active", "amount", "created_at", "notes"], [[1001, true, "12.5", "2026-07-07 08:15:00", "invoice"]], "sqlserver")).toEqual({
+      id: "BIGINT",
+      active: "BIT",
+      amount: "FLOAT",
+      created_at: "DATETIME2",
+      notes: "NVARCHAR(MAX)",
+    });
+    expect(importDataTypeForDatabase("decimal", "mysql")).toBe("DOUBLE");
+    expect(importDataTypeForDatabase("decimal", "postgres")).toBe("DOUBLE PRECISION");
+    expect(importDataTypeForDatabase("decimal", "sqlite")).toBe("REAL");
+    expect(importDataTypeForDatabase("decimal", "oracle")).toBe("BINARY_DOUBLE");
+  });
 });

apps/desktop/src/lib/table/tableImport.ts

@@ -243,6 +243,7 @@ export function importDataTypeForDatabase(inferredType: ImportInferredType, data
       return "BIGINT";
     case "decimal":
       if (["postgres", "gaussdb", "opengauss", "redshift", "kingbase", "highgo", "uxdb", "kwdb", "vastbase"].includes(databaseType || "")) return "DOUBLE PRECISION";
+      if (databaseType === "sqlserver") return "FLOAT";
       if (databaseType === "sqlite" || databaseType === "rqlite" || databaseType === "turso" || databaseType === "cloudflare-d1") return "REAL";
       if (databaseType === "oracle" || databaseType === "oceanbase-oracle" || databaseType === "dameng") return "BINARY_DOUBLE";
       if (databaseType === "clickhouse") return "Float64";