SQL 中的语法错误，'' 附近的语法不正确

Question

Anyone help me spotting what is wrong in this? Thanks in advanced

The Error comes from this section;

        AND ('''+@searchText+''' = '''' OR (ISNULL(CAST(t1.id as varchar(10)),'''') + '' '' +
                                    ISNULL(CAST(FORMAT(t1.reading_date,@dateformat) as varchar(12)),'''')+'' '' +
                                    ISNULL(t2.description,'''') + '' '' +
                                    ISNULL(t3.equipment_no,'''') + '' '' +
                                    ISNULL(t4.description,'''') + '' '' + 
                                    ISNULL(CAST(t1.actual_usage as nvarchar(16)),'''') + '' '' +
                                    ISNULL(t5.uom_code,'''') + '' '' +
                                    ISNULL(CAST(t1.actual_cost as nvarchar(16)),'''') + '' '' +
                                    ISNULL(t6.currency_code,'''') + '' '' +
                                    ISNULL(t1.comment,'''') + '' '' +
                                    ISNULL(CAST(FORMAT(t1.actual_date,@dateformat) as varchar(12)),'''')) LIKE ''%'' '''+@searchText+''' ''%'')

The Error:

Msg 102, Level 15, State 1, Line 59
Incorrect syntax near ''.

Answer 1

You can use CONCAT(string1, string2,...., string_n) instead of doing it manually using + operator. Also, use COALESCE to return column value or empty string. This will simplify the query.