Mysql datetime DEFAULT CURRENT_TIMESTAMP error

Question

1. When I ran this MYSQL syntax on windows it ran properly:

CREATE TABLE New
(
  id bigint NOT NULL AUTO_INCREMENT,
  timeUp datetime DEFAUL         


        

Answer 1

The DEFAULT CURRENT_TIMESTAMP support for a DATETIME (datatype) was added in MySQL 5.6.

In 5.5 and earlier versions, this applied only to TIMESTAMP (datatype) columns.

It is possible to use a BEFORE INSERT trigger in 5.5 to assign a default value to a column.

 DELIMITER $$

 CREATE TRIGGER ...
 BEFORE INSERT ON mytable
 FOR EACH ROW
 BEGIN
    IF NEW.mycol IS NULL THEN
       SET NEW.mycol = NOW();
    END IF;
 END$$

---

Case sensitivity (of queries against values stored in columns) is due to the collation used for the column. Collations ending in _ci are case insensitive. For example latin1_swedish_ci is case insensitive, but latin1_general_cs is case sensitive.

The output from SHOW CREATE TABLE foo will show the character set and collation for the character type columns. This is specified at a per-column level. The "default" specified at the table level applies to new columns added to the table when the new column definition doesn't specify a characterset.

UPDATE

Kaii pointed out that my answer regarding "case sensitivity" deals with values stored within columns, and whether queries will return a value from a column containing a value of "New" will be returned with a predicate like "t.col = 'new'".

See Kaii's answer regarding identifiers (e.g. table names) being handled differently (by default) on Windows than on Linux.